Gore-Tex vs. Other Waterproof Fabrics: What's Best for Fly Fishing?

When you're standing waist-deep in a cold river as storm clouds roll in, your waterproof jacket becomes one of the most critical pieces of gear you own. But with so many waterproof fabric technologies on the market—Gore-Tex, eVent, H2No, Toray, and others—how do you know which one is truly best for fly fishing? This comprehensive guide breaks down the science, performance, and real-world applications of different waterproof fabrics to help you make an informed decision for your next fishing jacket.

Understanding Waterproof-Breathable Technology

Before diving into specific fabric comparisons, it's essential to understand what makes a fabric both waterproof and breathable—two properties that seem contradictory but are crucial for fly fishing comfort.

The Waterproof Rating System

Waterproofness is measured in millimeters using hydrostatic head testing. This test determines how much water pressure a fabric can withstand before water penetrates through. Here's what the numbers mean:

• 5,000mm - 10,000mm: Light rain protection, suitable for casual use
• 10,000mm - 20,000mm: Moderate waterproofing for most fishing conditions
• 20,000mm+: Highly waterproof, suitable for extended exposure and harsh weather

For fly fishing, where you're often in direct contact with water while wading and exposed to spray, a minimum rating of 15,000mm is recommended, with 20,000mm+ being ideal for serious anglers.

Breathability Matters Just as Much

Breathability is measured in grams of water vapor that can pass through one square meter of fabric in 24 hours (g/m²/24hr). The higher the number, the more breathable the fabric:

• 5,000 g/m²/24hr: Low breathability, suitable for minimal activity
• 10,000 - 15,000 g/m²/24hr: Moderate breathability for most activities
• 20,000+ g/m²/24hr: High breathability for intense activity

Why does this matter for fly fishing? Even on cold days, repetitive casting, wading against current, and hiking to your favorite spot generate significant body heat and perspiration. Without adequate breathability, moisture accumulates inside your jacket, leaving you wet from the inside out—defeating the purpose of waterproof gear entirely.

Gore-Tex: The Gold Standard

Gore-Tex has been the benchmark in waterproof-breathable fabrics since its introduction in 1969. But what makes it so special, and is the premium price justified for fly fishing applications?

How Gore-Tex Works

Gore-Tex uses expanded polytetrafluoroethylene (ePTFE), a membrane with approximately 9 billion pores per square inch. Each pore is 20,000 times smaller than a water droplet but 700 times larger than a water vapor molecule. This means rain can't penetrate, but perspiration vapor can escape.

Gore-Tex Variations for Fishing

Not all Gore-Tex is created equal. Understanding the different versions helps you select the right option:

Gore-Tex Pro: The most durable and breathable version, designed for extended use in harsh conditions. This is often found in premium wading jackets and offers the best performance for serious anglers who fish in challenging weather. It typically features a 40,000mm+ waterproof rating and exceptional breathability around 25,000 g/m²/24hr.

Gore-Tex Paclite: A lightweight, packable option perfect for anglers who want backup rain protection without bulk. While less durable than Pro, it's ideal for summer fishing when you need occasional rain protection. It offers around 28,000mm waterproofing with moderate breathability.

Gore-Tex Active: Designed for high-output activities, this version maximizes breathability while maintaining excellent waterproofing. It's a great choice for anglers who hike long distances to remote fishing spots.

Advantages of Gore-Tex for Fly Fishing

1. Proven Reliability: Decades of real-world testing across countless conditions
2. Excellent Durability: Resists abrasion from backpack straps, brush, and repeated use
3. Long-Term Waterproofing: Maintains performance over many seasons with proper care
4. Wide Temperature Range: Performs well in both cold and moderate conditions
5. Industry Support: Most premium fishing brands offer Gore-Tex options with fishing-specific features

Potential Drawbacks

1. Premium Price: Gore-Tex jackets typically cost $400-$750, a significant investment
2. Requires DWR Maintenance: The Durable Water Repellent (DWR) coating needs periodic reapplication
3. Not the Most Breathable: Some newer technologies outperform Gore-Tex in breathability
4. Environmental Concerns: Traditional Gore-Tex production involves PFCs (perfluorinated chemicals), though Gore has introduced PFC-free versions

eVent: The Breathability Champion

eVent represents a significant innovation in waterproof-breathable technology, using a different approach that many anglers find superior for high-activity fishing.

Direct Venting Technology

Unlike Gore-Tex, which relies on a polyurethane coating, eVent uses "Direct Venting" technology. The membrane's pores remain open, allowing immediate vapor transmission without waiting for a humidity differential. This means sweat vapor escapes as soon as it's produced, rather than accumulating inside the jacket first.

Performance Characteristics

eVent fabrics typically offer:

• Waterproofing: 30,000mm+ (highly waterproof)
• Breathability: 20,000-30,000 g/m²/24hr (excellent)
• Weight: Comparable to Gore-Tex Pro

Why Anglers Choose eVent

1. Superior Breathability: Particularly noticeable during high-output activities like hiking to remote streams or fishing in warmer weather
2. Faster Moisture Management: No internal condensation buildup during active periods
3. Excellent Waterproofing: Matches or exceeds Gore-Tex in wet conditions
4. Good Durability: Holds up well to fishing wear and tear

Considerations

1. Less Common: Fewer fishing-specific jackets available compared to Gore-Tex
2. DWR Dependency: Still requires maintenance of outer DWR coating
3. Price: Similar to Gore-Tex, typically $350-$600
4. Less Brand Recognition: Some anglers prefer the proven track record of Gore-Tex

Patagonia H2No: Performance with Sustainability

Patagonia's proprietary H2No technology offers an environmentally conscious alternative while maintaining excellent performance for fly fishing.

Multi-Layer Construction

H2No uses a multi-layer construction with a waterproof-breathable membrane sandwiched between durable face fabrics. Recent versions incorporate recycled materials and eliminate harmful PFCs from the manufacturing process.

Performance Profile

• Waterproofing: 20,000-30,000mm (very good)
• Breathability: 15,000-20,000 g/m²/24hr (good to very good)
• Environmental Impact: PFC-free DWR, recycled materials

Why It Works for Fly Fishing

1. Environmental Responsibility: Important for anglers who care about protecting waterways
2. Proven in Patagonia's Fishing Line: Tested extensively in real fishing conditions
3. Fair Price-to-Performance: Often $50-100 less than comparable Gore-Tex options
4. Good Durability: Designed for active outdoor use including fishing

Trade-offs

1. Breathability Gap: Slightly less breathable than eVent or high-end Gore-Tex
2. Brand-Specific: Only available in Patagonia products
3. Performance Variation: Different H2No versions offer varying performance levels

Other Notable Waterproof Technologies

Toray and Dermizax

These Japanese-developed membranes offer excellent performance, particularly in terms of stretch and comfort. They're increasingly found in technical fishing apparel and offer:

• High Breathability: Competitive with eVent
• Excellent Stretch: More comfortable for casting and active movement
• Good Waterproofing: 20,000mm+ ratings common

The North Face FutureLight

One of the newest technologies, FutureLight uses nano-spinning to create a breathable membrane with good waterproofing. While not yet common in fishing-specific gear, it shows promise for future applications.

Branded Technologies (Simms, Grundens, etc.)

Many fishing brands develop proprietary waterproof fabrics or license and customize existing technologies. These often provide excellent value and are designed specifically for fishing applications, though they may not carry the same brand recognition as Gore-Tex.

Real-World Application: Matching Fabric to Fishing Style

The "best" waterproof fabric depends entirely on how, where, and when you fish.

Cold-Weather Steelhead and Salmon Fishing

Best Choice: Gore-Tex Pro or high-end eVent

Why: Extended exposure to rain, spray, and harsh conditions demands maximum durability and waterproofing. These fisheries often involve hiking, wading, and long days in challenging weather where both breathability and waterproof performance are crucial.

Summer Trout Fishing

Best Choice: Patagonia H2No, Gore-Tex Paclite, or lightweight proprietary fabrics

Why: Summer fishing rarely involves all-day rain, so you need packable, breathable protection that won't overheat you during brief showers. The focus shifts from maximum waterproofing to breathability and weight.

Tropical Saltwater Fishing

Best Choice: eVent or highly breathable proprietary fabrics

Why: High temperatures and humidity make breathability the top priority. While you need protection from tropical downpours, moisture management becomes critical to prevent overheating.

General Freshwater Fishing (Spring/Fall)

Best Choice: Gore-Tex or H2No (standard weight)

Why: These shoulder seasons bring variable conditions where balanced performance matters most. You need reliable waterproofing for rainy days without sacrificing breathability during active periods.

Beyond the Membrane: Other Critical Factors

The waterproof membrane is only one part of the equation. For fly fishing, these factors are equally important:

Construction Quality

Seam sealing, zipper quality, and overall construction determine whether water actually stays out. Premium jackets use fully taped seams and waterproof zippers to eliminate potential leak points.

Fishing-Specific Features

Look for:

• High hand pockets: Accessible while wearing a wader belt or chest pack
• Storm cuffs: Seal water out when landing fish or reaching into water
• Hood adjustments: Stay in place during casting and in wind
• Ventilation options: Pit zips or chest vents for temperature regulation

Fit and Mobility

Articulated sleeves and generous cut through the shoulders enable unrestricted casting motion—critical for all-day comfort.

DWR Treatment

The Durable Water Repellent coating on the outer fabric is crucial for performance. When DWR fails, water saturates the face fabric, dramatically reducing breathability regardless of membrane quality.

Care and Maintenance: Maximizing Longevity

Regardless of which waterproof fabric you choose, proper care extends its lifespan and maintains performance:

1. Wash Regularly: Dirt and body oils clog membrane pores, reducing breathability
2. Use Appropriate Detergent: Technical fabric cleaners won't damage membranes or DWR
3. Reapply DWR: When water no longer beads on the surface, treat with spray-on or wash-in DWR
4. Heat Activation: After applying DWR, tumble dry on low or carefully iron to activate the coating
5. Store Properly: Hang in a cool, dry place away from direct sunlight

With proper maintenance, a quality waterproof fishing jacket can deliver 5-10+ years of reliable performance.

The Verdict: What's Best for Fly Fishing?

There's no single "best" waterproof fabric for all fly fishing scenarios, but here are evidence-based recommendations:

For Maximum Performance: Gore-Tex Pro or eVent offer the best combination of waterproofing, breathability, and durability. These are ideal for anglers who fish frequently in challenging conditions and view their rain gear as a critical investment.

For Best Value: Quality proprietary fabrics from fishing-specific brands often deliver 90% of the performance at 60-70% of the cost. These represent the sweet spot for most anglers.

For Environmental Consciousness: Patagonia H2No and other PFC-free options provide excellent performance while minimizing environmental impact—important for those who want to protect the waters they fish.

For Specialized Needs: Consider eVent for high-output activities, Gore-Tex Paclite for packable backup protection, and highly breathable options for warm-weather fishing.

Ready to Choose Your Waterproof Fishing Jacket?

Understanding waterproof fabric technology helps you make an informed decision, but nothing replaces trying on different options to find the right fit and features for your fishing style. Whether you choose Gore-Tex, eVent, H2No, or another quality waterproof fabric, investing in proper rain gear means more days on the water and better comfort when conditions turn challenging.

Explore our complete selection of rain and wading jackets featuring Gore-Tex, eVent, and other premium waterproof fabrics designed specifically for fly fishing. From lightweight packable shells to fully-featured wading jackets, find the waterproof protection that matches your needs and keeps you fishing longer.