--- title: Safety Rainwear Explained description: "How does rain effect compliance? Spoiler alert: a lot of ways. 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[Instrumentation Program](https://offers.gosafe.com/programs-services?hsLang=en#instrumentation) - [FR Clothing Program](https://offers.gosafe.com/programs?hsLang=en) - [Boot & Shoe Program](https://offers.gosafe.com/programs?hsLang=en) - [VENDORS](https://www.gosafe.com/ecommerce/category/preferred-vendors) - [Contact Us](https://www.gosafe.com/ecommerce/catalogcontactus.aspx) ## SAFETY RAINWEAR ## EXPLAINED   # ALL ABOUT RAINWEAR --- ## **The Misunderstood Label Why Relying on ASTM D6413 Can Compromise Worker Safety in Flash Fires & Arc Flashes** [![Rainwear-A](https://offers.gosafe.com/hubfs/2025-BlogImages/Rainwear%20Blog%20Images/Rainwear-A.jpg "Rainwear-A")](https://offers.gosafe.com/hubfs/FR%20Clothing%20LandingPage/E24-BurnAwarenessWeek.png?hsLang=en) #### **Protect Your Workforce From Water, Fire, & Flash** Imagine a safety manager auditing their team’s PPE before a rainy shift. They spot a rack of high-visibility rain jackets, check the tags, and see **"Tested to ASTM D6413."** Satisfied that the gear is flame-resistant (FR) and their workers are protected against a sudden flash fire or arc flash, they sign off. It’s a common scenario - and it’s a dangerous mistake. [![Read The Full Article](https://hubspot-no-cache-na2-prod.s3.amazonaws.com/cta/default/2816956/ea4edc5e-f561-4371-8bc1-fddcc4256de4.png)](https://hubspot-cta-redirect-na2-prod.s3.amazonaws.com/cta/redirect/2816956/ea4edc5e-f561-4371-8bc1-fddcc4256de4) ## **The Dangers Of Misconceptions** In the safety industry, there is a critical, widespread misconception about what that specific ASTM label actually means. Relying on ASTM D6413 as proof of comprehensive worker protection doesn’t just violate best practices; it puts lives at risk. Here is the truth behind the label and why your FR rainwear needs to meet much more rigorous, hazard-specific standards. ## **The Illusion of Safety: What ASTM D6413 Actually Measures** The core of the misunderstanding lies in confusing a **component test** with a **garment performance standard**. **ASTM D6413** is a vertical flame test. It is a small-scale, bench-top laboratory method designed to measure a specific material sample's resistance to ignition. During this test: - A 3-inch by 12-inch strip of fabric is exposed to a controlled flame for 12 seconds. - Technicians measure the **char length** (how far the fabric burns) and **afterflame time** (how long it keeps burning after the flame is removed). While ASTM D6413 is an excellent tool for quality control and a foundational step in textile manufacturing, **it is not a garment pass/fail standard.** **The Reality Check:** A fabric strip might pass a vertical flame test in a controlled lab, but that does not tell you how an entire rain jacket - complete with seams, zippers, snaps, and coatings—will behave when engulfed in a 1,900°C flash fire or subjected to the massive thermal energy of an arc flash. Rainwear made of melting plastics (like untreated PVC or polyurethane) can pass D6413 if treated with fire retardants, yet still melt into a worker’s skin during a real-world thermal event. ## **The Hazard-Specific Standards That Actually Matter** If your workers face flash fire hazards (common in oil and gas or chemical processing), **ASTM D6413** is wildly insufficient. You must look for **ASTM F2733**. Unlike a simple bench test, **ASTM F2733** subjects a fully outfitted thermal mannequin ("instrumented mannequin") to a simulated 3-second flash fire. - **The Requirement:** To pass, the garment must limit predicted total body burn to **less than 40%**. - **The Scope:** It tests the entire garment system, ensuring that closures don't fuse shut, fabric doesn't melt or shrink drastically, and the jacket can actually be removed quickly post-incident. **2. Arc Flash Protection: ASTM F1891** For electrical utilities and live-line workers, an arc flash is a constant threat. Rainwear for these environments must be certified to **ASTM F1891**. This standard evaluates the material's Arc Thermal Performance Value (ATPV) or Breakopen Threshold Energy (EBT). It ensures that the rainwear will not melt and contribute to a worker's injuries when exposed to the extreme radiant heat of an electric arc, while establishing a definitive Arc Rating (cal/cm²). | **Standard** | **What it Does** | **The Testing Method** | **The Critical Pass Criterion** | | --- | --- | --- | --- | | **ASTM D6413** | Fabric Strip Ignition | 12-second vertical flame burner | Char length & afterflame time only | | **ASTM F2733** | Full Garment Flash Fire Safety | 3-second thermal mannequin engulfment | **\< 40% total body burn prediction** | | **ASTM F1891** | Full Garment Arc Flash Safety | Open-air electric arc exposure | **No melting/dripping; establishes Cal Rating** | ## **Why NFPA 2112 Won't Save Your Rainwear** Another point of confusion for safety managers is **NFPA 2112**, the gold standard for flame-resistant garments protecting against industrial flash fires. It is incredibly common to seek out NFPA 2112 certification for daily workwear like coveralls, jeans, and shirts. However, **rainwear is explicitly excluded from the scope of NFPA 2112.** Because rainwear requires specialized water-resistant coatings (like polyurethane or PVC laminated to a flame-resistant base fabric), it behaves differently under thermal stress than breathable cotton or aramid daily workwear. Recognizing this difference, the National Fire Protection Association left rainwear out of NFPA 2112, leaving **ASTM F2733** and **ASTM F1891** as the definitive, legally recognized standards for protective outerwear. ## **Action Items for Safety Managers** It’s time to look closely at your protective outerwear inventory. To ensure your team is genuinely protected, transition from "flame-retardant" assumptions to certified protection: 1. **Audit Your Labels:** Check your current rainwear inventory. If a tag only cites ASTM D6413, understand that it is *not* rated as a protective garment for flash fire or arc flash environments. 2. **Specify the Right Standards in Procurement:** Update your safety manuals and purchasing specs. Demand **ASTM F2733** for flash fire hazards and **ASTM F1891** for electrical arc hazards. 3. **Remember the Hierarchy:** Treat ASTM D6413 as a raw material baseline, never the final word on human safety. When the storm hits and a thermal event occurs, a worker shouldn't have to discover that their rain jacket was only tested on a lab bench. Ensure your gear matches the hazard, not just the buzzword [![Read The Full Article](https://hubspot-no-cache-na2-prod.s3.amazonaws.com/cta/default/2816956/ea4edc5e-f561-4371-8bc1-fddcc4256de4.png)](https://hubspot-cta-redirect-na2-prod.s3.amazonaws.com/cta/redirect/2816956/ea4edc5e-f561-4371-8bc1-fddcc4256de4) --- [![Shop Rainwear Products](https://hubspot-no-cache-na2-prod.s3.amazonaws.com/cta/default/2816956/25b724e9-6315-482c-91f0-a948373f9cec.png)](https://hubspot-cta-redirect-na2-prod.s3.amazonaws.com/cta/redirect/2816956/25b724e9-6315-482c-91f0-a948373f9cec) ## **Beyond the Vest** Navigating ANSI/ISEA 107 Class 2 vs. Class 3 Rainwear in Low-Visibility Downpours **COMING SOON** ![Rainwear-B](https://offers.gosafe.com/hubfs/2025-BlogImages/Rainwear%20Blog%20Images/Rainwear-B.jpg "Rainwear-B") #### **The Right Hi-Vis For Rainy Days** When a summer thunderstorm hits a roadway construction site or a torrential downpour rolls over an industrial railyard, ambient light doesn't just fade - it plunges. As skies darken, falling sheets of water scatter light, windshield wipers struggle to keep pace, and braking distances for heavy machinery double. [![Read The Full Article](https://hubspot-no-cache-na2-prod.s3.amazonaws.com/cta/default/2816956/aa11721e-fe1c-43a6-b185-f468454d6731.png)](https://hubspot-cta-redirect-na2-prod.s3.amazonaws.com/cta/redirect/2816956/aa11721e-fe1c-43a6-b185-f468454d6731) ## **Stay Hi-Vis In Low-Visibility Weather** For safety procurement teams, this is the exact moment where compliance transitions from a legal checkbox to a life-saving barrier. Yet, all too often, the personnel responsible for outfitting crews make a critical mistake: they treat industrial rainwear as if it were just a waterproof version of a standard high-visibility safety vest. Selecting industrial rainwear based purely on color (choosing "safety yellow" or "orange" because it looks bright in a well-lit warehouse) leaves field workers exposed to extreme risk. Rainwear demands a far more strategic approach to high-visibility compliance. Let’s explore the critical intersection of waterproofing and the **ANSI/ISEA 107 standard**, focusing on why the choice between Performance Class 2 and Class 3 matters most when the weather is at its worst. ## **The Low-Visibility Cocktail: Rain, Darkness, and Speed** In a heavy downpour, a worker standing on the shoulder of a highway or navigating a busy logistics yard faces a triple threat: 1. **Drastically Reduced Contrast:** Rain clouds block natural sunlight, reducing the contrast between a worker and their background. 2. **Visual Distortion:** Water on vehicle windshields and equipment mirrors refracts light, creating glare and breaking up the visual silhouette of anyone nearby. 3. **Delayed Human-Form Recognition:** At 55 mph, a motorist travels over 80 feet per second. If a driver takes three full seconds to recognize that a yellow shape in the distance is an actual human being rather than a construction barrel, they will have traveled nearly 250 feet before their foot even touches the brake. This is why ANSI/ISEA 107 defines specific **Performance Classes**. The higher the class, the more retroreflective material (reflective tape) and background material (high-visibility fluorescent fabric) are required to cut through environmental chaos. ## **Class 2 vs. Class 3 Rainwear: Understanding the Thresholds** To build an effective rainwear spec, procurement teams must understand the physical and geometric differences between Performance Class 2 and Performance Class 3 garments. ### **Performance Class 2: The Baseline for Moderate Risk** Class 2 garments are designed for environments where workers are exposed to traffic exceeding 25 mph, or where tasks distract them from approaching hazards. - **The Minimums:** A Class 2 garment must feature at least **775 square inches** of background fabric and **201 square inches** of retroreflective material. - **The Silhouette:** Class 2 rain jackets typically feature vertical and horizontal reflective bands across the torso. While highly visible from a distance, a Class 2 jacket alone may not provide enough visual information to communicate a full range of human motion when a worker bends over or turns sideways in a heavy storm. ### **Performance Class 3: Maximum Visibility for High-Hazard Zones** Class 3 compliance is mandated for workers exposed to high-speed traffic, wide ranges of weather conditions, and highly complex backgrounds where the worker’s tasks create a high cognitive load. - **The Minimums:** Class 3 garments increase the requirements to a minimum of **1,240 square inches** of background material and **310 square inches** of reflective material. - **The Game-Changer (Sleeve Reflectivity):** A garment cannot be rated Class 3 unless it features retroreflective material on the sleeves. ### **Why Sleeve Reflectivity is Absolute** In a low-visibility downpour, **human-form recognition** is everything. When a worker is moving their arms - whether signaling a crane, holding a tool, or directing traffic - the horizontal and vertical movement of reflective bands on the sleeves immediately signals "human" to an oncoming driver or heavy equipment operator. Without sleeve reflectivity, a worker wearing a rain jacket in a dark storm can blend into a background of stationary reflective signage or orange barrels. The sleeves project the active geometry of a person in motion, which triggers faster reaction times from equipment operators. ## **The Rainwear Math: Creating a Class 3 Ensemble** Procurement professionals often experience sticker shock when looking at dedicated Class 3 heavy-duty rain jackets. Because of the sheer volume of fluorescent, waterproof fabric and taped reflective seams required to build a standalone Class 3 jacket, these garments can be bulky and expensive. Fortunately, the ANSI/ISEA 107 standard offers a highly practical, modular solution for industrial outfitting: **The Ensemble Rule.** Under the standard, high-visibility trousers, bibs, and shorts are classified as **Class E** garments. While Class E pants do not meet standalone compliance for roadside work on their own, they act as a multiplier when paired with upper-body garments. Class 2 Jacket + Class E Pants/Bib = Performance Class 3 Ensemble By equipping your crew with a Class 2 waterproof rain jacket and a pair of Class E rain pants or bibs, the combined square inches of background and reflective material across the upper and lower body elevate the worker to **full Class 3 compliance**. ### **The Strategic Benefits of the Ensemble Approach:** - **Cost-Effective Versatility:** Workers can wear just the Class 2 rain jacket during lighter, daytime rain when risks are lower, and pull on the Class E pants when a severe downpour drops ambient light levels or when they step into a higher-hazard zone. - **Full-Body Waterproofing:** In heavy downpours, a jacket alone ensures that water simply sheds down into the worker’s boots and work pants. Providing the full ensemble keeps workers dry from head to toe, protecting against hypothermia and boosting morale, while simultaneously ensuring peak visibility. ## **Procurement Checklist: Beyond the Fabric Color** When you are auditing your next industrial rainwear order, look past the bright color and ask the following technical questions: 1. **Is the garment certified to ANSI/ISEA 107-2020?** Ensure the manufacturer provides a certificate of compliance confirming the square-inch thresholds are met. 2. **What is the waterproof rating?** Look for rainwear with taped, sealed, or heat-welded seams. High-visibility fabric is useless if the polyurethane or PVC coating fails and saturates the worker within an hour. 3. **Does the environment demand a standalone Class 3 jacket?** If your workers are operating in tight spaces where they frequently shed layers, or if they do not consistently wear rain pants, invest in standalone Class 3 jackets with full sleeve reflectivity. 4. **Have we accounted for dirt and degradation?** Rainwater mixed with road grime, mud, and oil quickly degrades the performance of fluorescent fabric and reflective tape. Ensure your procurement cycle accounts for regular replacement or heavy-duty laundering of fouled gear. ## **Conclusion** When the skies open up and visibility drops to near zero, a high-visibility vest tossed over a standard black rain jacket is a recipe for disaster. Navigating ANSI/ISEA 107 compliance requires understanding how waterproof garments alter a worker's visual profile. By strategically selecting Class 2 jackets and pairing them with Class E pants - or deploying full Class 3 garments with mandatory sleeve reflectivity - procurement teams can ensure their crews stay dry, remain recognizable as human forms, and return home safely at the end of the shift. [![Read The Full Article](https://hubspot-no-cache-na2-prod.s3.amazonaws.com/cta/default/2816956/aa11721e-fe1c-43a6-b185-f468454d6731.png)](https://hubspot-cta-redirect-na2-prod.s3.amazonaws.com/cta/redirect/2816956/aa11721e-fe1c-43a6-b185-f468454d6731) --- [![Shop Rainwear Products](https://hubspot-no-cache-na2-prod.s3.amazonaws.com/cta/default/2816956/25b724e9-6315-482c-91f0-a948373f9cec.png)](https://hubspot-cta-redirect-na2-prod.s3.amazonaws.com/cta/redirect/2816956/25b724e9-6315-482c-91f0-a948373f9cec) ## **The Danger of the "Plastic Wrap" Effect** How Non-Breathable Rainwear Triggers Internal Heat Stress ![Rainwear-C](https://offers.gosafe.com/hubfs/2025-BlogImages/Rainwear%20Blog%20Images/Rainwear-C.jpg "Rainwear-C") #### **Letting Workers Breath In Hot Humid Conditions** It’s pouring on the job site, the wind is howling, and your crew is outfitted in heavy-duty, 100% waterproof rain gear. On paper, they are completely protected from the elements. But twenty minutes into the shift, a different kind of storm is brewing inside their suits. As they lift, haul, and climb, their bodies generate intense metabolic heat and sweat. [![Read The Full Article](https://hubspot-no-cache-na2-prod.s3.amazonaws.com/cta/default/2816956/add40b92-4252-4c78-9082-5f39186f4577.png)](https://hubspot-cta-redirect-na2-prod.s3.amazonaws.com/cta/redirect/2816956/add40b92-4252-4c78-9082-5f39186f4577) ## **The Personal Greenhouse Effect** With nowhere for that moisture to escape, the rainwear acts like a layer of industrial plastic wrap. It creates a personal greenhouse effect - trapping heat, skyrocketing humidity against the skin, and rapidly accelerating the risk of internal heat stress. Faced with unbearable discomfort, workers do what anyone would do to survive: they unzip. They roll up their sleeves. They compromise their PPE. In trying to keep the rain out, non-breathable rainwear accidentally drives worker non-compliance, pushing crews to violate safety protocols just to catch a breath. Here is why the "plastic wrap" effect is a hidden hazard - and how safety managers can fight back using the right technical specifications. ## **The Hidden Danger: Rain, Sweat, and OSHA's Heat Standards** We traditionally associate heat illness with blazing sun and blue skies. However, OSHA’s regulatory focus makes no exceptions for rainy days. Under recent frameworks, including enforcement initiatives surrounding heat illness prevention, employers are legally obligated to mitigate heat hazards regardless of the weather. When a worker wears non-breathable rainwear, the microclimate inside the suit can quickly reach dangerous levels, even in moderate or cool outdoor temperatures. **How the Microclimate Collapses** 1. **Evaporative Cooling Fails:** The human body cools itself down by sweating; as sweat evaporates, it carries heat away. 2. **The Humidity Spike:** Non-breathable materials trap that sweat. The air inside the suit reaches 100% relative humidity almost instantly. 3. **The Heat Trap:** Because the air is saturated, sweat can no longer evaporate. The body loses its primary cooling mechanism, causing the core temperature to spike dangerously. When a worker unzips a jacket in a downpour to relieve this heat, they aren't just getting wet - they are exposing themselves to the primary site hazards the PPE was meant to protect against, from chemical splashes to low-visibility strikes. ## **Decoding the Data: How to Balance Waterproof Integrity with Breathability** To beat the plastic wrap effect and maintain strict compliance, safety managers must look past the "100% waterproof" label and demand specific technical performance metrics. True industrial rainwear must act as a one-way valve: keeping heavy rain out while allowing microscopic sweat vapor to escape. When vetting your next PPE shipment, there are two critical metrics you need to evaluate: ### **1. Water Resistance: Hydrostatic Head Rating** To ensure your crew stays dry from the outside, look for the fabric’s hydrostatic head rating, which measures water penetration resistance under pressure. - **The Baseline:** For industrial-grade protection against driving rain and pressure from kneeling or leaning, look for a **minimum of 5,000mm**. - **What it means:** A 5,000mm rating means the fabric can withstand a 5,000-millimeter column of water sitting on top of it before a single drop leaks through. ### **2. Breathability: Moisture Vapor Transmission Rate (MVTR)** This is the antidote to the plastic wrap effect. MVTR measures how many grams of water vapor can pass through **a square meter of the fabric over a 24-hour period (g/m2/24hrs).** | **MVTR Rating** | **Performance Level** | **Best Used For** | | --- | --- | --- | | **Below 5,000 g/m2** | Low Breathability | Stationary work, short durations | | **5,000 - 10,000 g/m2** | Moderate Breathability | Standard industrial work, walking, light lifting | | **10,000 + g/m2** | High Breathability | High-exertion tasks, heavy labor in humid conditions | **Safety Takeaway:** For active industrial crews, aim for rainwear that pairs a **5,000mm hydrostatic head** with an **MVTR of at least 5,000 to 10,000 g/m2**. This ensures a mathematically proven balance between external storm protection and internal heat dissipation. ## **Overcoming the Compliance Hurdle** If your safety policy requires rain gear, but your team is constantly "forgetting" to wear it correctly, it’s rarely a discipline problem - it’s usually a comfort problem. Investing in breathable, high-MVTR rainwear removes the physical trigger for non-compliance. When workers don't feel like they are baking alive inside their suits, they keep them zipped, keeping your site compliant with both OSHA heat standards and standard PPE protocols. Protecting your workers from the rain shouldn't mean exposing them to heat stress. Ditch the plastic wrap, audit your rainwear’s technical specs, and give your crew gear that breathes. [![Read The Full Article](https://hubspot-no-cache-na2-prod.s3.amazonaws.com/cta/default/2816956/add40b92-4252-4c78-9082-5f39186f4577.png)](https://hubspot-cta-redirect-na2-prod.s3.amazonaws.com/cta/redirect/2816956/add40b92-4252-4c78-9082-5f39186f4577) [![Shop Rainwear Products](https://hubspot-no-cache-na2-prod.s3.amazonaws.com/cta/default/2816956/25b724e9-6315-482c-91f0-a948373f9cec.png)](https://hubspot-cta-redirect-na2-prod.s3.amazonaws.com/cta/redirect/2816956/25b724e9-6315-482c-91f0-a948373f9cec) --- ## **The 2025 OSHA Construction PPE Fit Mandate Is Your Rainwear Sized Correctly for All Workers?** **COMING SOON** ![Rainwear-F](https://offers.gosafe.com/hubfs/2025-BlogImages/Rainwear%20Blog%20Images/Rainwear-F.jpg "Rainwear-F") #### Rainwear Fit For The Worker Addressing OSHA’s recent regulatory update regarding personal protective equipment sizing. Full Article Coming Soon --- ## **Hidden Weaknesses Why Your Rainwear Seams, Zippers, & D-Ring Pass-Throughs Determine True Compliance** **COMING SOON** ![Rainwear-D](https://offers.gosafe.com/hubfs/Rainwear-D.jpg "Rainwear-D") #### Avoid The Gaps In Rainwear Safety A deep dive into garment construction, pointing out that rainwear fabric is only as safe as its weakest components. Full Article Coming Soon --- ## **The Total Cost of Ownership (TCO) Calculator Why Cheap Non-FR Rainwear is Costing Your Company Thousands** **COMING SOON** ![Rainwear-G](https://offers.gosafe.com/hubfs/2025-BlogImages/Rainwear%20Blog%20Images/Rainwear-G.jpg "Rainwear-G") #### Buy Once, Cry Less Overcoming the "sticker shock" safety managers face when looking at premium or engineered FR/AR rainwear. Full Article Coming Soon --- ## **The Coated vs. Inherent Debate Longevity, Washing, and Maintenance of Industrial Rainwear** **COMING SOON** ![Rainwear-E](https://offers.gosafe.com/hs-fs/hubfs/2025-BlogImages/Rainwear%20Blog%20Images/Rainwear-E.jpg?width=1200&height=600&name=Rainwear-E.jpg "Rainwear-E") #### Making Rainwear Last Demystifying how to clean and care for specialized rainwear without stripping away its protective properties. Full Article Coming Soon --- **goSafe's Blog Articles on this topic**  - [The Misunderstood Label: Why Relying on ASTM D6413 Can Compromise Worker Safety in Flash Fires & Arc Flashes](https://blog.gosafe.com/the-misunderstood-label-why-relying-on-astm-d6413-can-compromise-worker-safety-in-flash-fires-and-arc-flashes?hsLang=en) - [Beyond the Vest: Navigating ANSI/ISEA 107 Class 2 vs. Class 3 Rainwear in Low-Visibility Downpours](https://blog.gosafe.com/beyond-the-vest-navigating-ansi/isea-107-class-2-vs.-class-3-rainwear-in-low-visibility-downpours?hsLang=en) - [The Danger of the 'Plastic Wrap' Effect: How Non-Breathable Rainwear Triggers Internal Heat Stress](https://blog.gosafe.com/the-danger-of-the-plastic-wrap-effect-how-non-breathable-rainwear-triggers-internal-heat-stress?hsLang=en) --- [![Shop Rainwear Products](https://hubspot-no-cache-na2-prod.s3.amazonaws.com/cta/default/2816956/25b724e9-6315-482c-91f0-a948373f9cec.png)](https://hubspot-cta-redirect-na2-prod.s3.amazonaws.com/cta/redirect/2816956/25b724e9-6315-482c-91f0-a948373f9cec) Copyright © 2026 - All Rights Reserved - gosafe.com [![“goSafe](https://offers.gosafe.com/hubfs/1%20-%20Core%20Assets/Hubspot%20Header-Footer%20Rehost/gss-social-twit-w.png)](https://twitter.com/gosafeSupply) [![“goSafe](https://offers.gosafe.com/hubfs/1%20-%20Core%20Assets/Hubspot%20Header-Footer%20Rehost/gss-social-insta-w.png)](https://www.instagram.com/gosafesupply/) [![“goSafe](https://offers.gosafe.com/hubfs/1%20-%20Core%20Assets/Hubspot%20Header-Footer%20Rehost/gss-social-linked-w.png)](https://www.linkedin.com/company/gosafesupply) [![“goSafe](https://offers.gosafe.com/hubfs/1%20-%20Core%20Assets/Hubspot%20Header-Footer%20Rehost/gss-social-fb-w.png)](https://www.facebook.com/gosafesupply)