Waterproof Fabrics 101 for Custom Jacket: EVA, PU, PVC, Nylon & Polyester Compared

How Waterproofing Works: The Three Layers of a Rain Jacket

A waterproof jacket is a system rather than a single material. Understanding the three functional layers explains why two jackets made from the same base fabric can behave completely differently in the rain.

Face Fabric

The face fabric is the visible outer layer and carries most of the mechanical requirements: abrasion resistance, tear strength, colour fastness and hand feel. Nylon and polyester dominate this layer because both are strong, light and available in recycled versions. The face fabric alone is rarely waterproof, since woven textiles are porous by design.

Membrane or Coating

Waterproofing comes from a coating applied to the back of the fabric, a laminated membrane, or a film in the case of EVA and PVC. The coating blocks liquid water from passing through while allowing a limited amount of water vapour to escape. The chemical nature of this layer determines breathability, durability and price far more than the face fabric does.

Durable Water Repellent Finish

The durable water repellent finish, or DWR, sits on the outer surface and makes rain bead and roll off. Without it, water soaks into the face fabric, the garment becomes heavy and the wearer feels cold. A DWR finish is not permanent; it degrades with abrasion and repeated washing, which is why care instructions matter as much as specification sheets.

Reading Waterproof and Breathability Ratings

Ratings let you compare fabrics objectively instead of relying on marketing language. Waterproofing is measured by the height of a water column the fabric can hold before leaking, expressed in millimetres. Breathability is measured in grams of water vapour passing through one square metre in twenty four hours.

EVA: Lightweight and Chlorine Free

EVA, or ethylene vinyl acetate, is a flexible foam like film used mainly in lightweight rainwear, ponchos and promotional outerwear. It is chlorine free, soft at low temperatures and inexpensive, which makes it a practical choice where low unit cost and packability outweigh long term durability.

Where EVA Performs Well

EVA is completely waterproof as a film, so it does not rely on a coating for protection. It stays flexible in cold conditions where PVC can stiffen, and it can be heat welded to create seam free panels. For festival ponchos, event giveaways and emergency rainwear packed into a small pouch, EVA delivers a low cost result quickly.

Where EVA Falls Short

EVA has limited tear and abrasion resistance, so it is unsuitable for garments that see daily wear. It cannot be dyed to the same depth as woven fabrics, and its hand feel reads as functional rather than premium. Breathability is minimal, which becomes uncomfortable during any sustained activity.

Typical Applications

Promotional rain ponchos, packable emergency raincoats, lightweight cycling capes, packaging and event merchandise. For retail collections aimed at repeat wear, most brands move up to a PU coated woven fabric.

PU: The Balance of Style and Protection

Polyurethane is the most common coating in fashion and lifestyle waterproof jackets. It is applied to a woven base fabric, most often polyester or nylon, and creates a flexible waterproof layer that can be finished matte, glossy or with a leather-like surface effect.

Advantages of PU Coatings

PU combines waterproofing with a soft hand feel, which is why it dominates urban rain jackets. It accepts pigment and surface finishes easily, so a designer can specify a matte technical look or a shiny fashion finish from the same base cloth. Breathability is moderate, roughly three to five times better than PVC, and the coating bonds well to polyester, the most economical base fabric.

Limitations to Plan For

PU coatings can hydrolyse over time, especially in hot humid storage, and the first sign is a tacky surface or peeling. Lifespan depends heavily on coating thickness and storage conditions, so specify a minimum coating weight and ask how the garment should be stored. PU fabrics cost more than EVA and require careful packing to avoid blocking in warm warehouses.

Typical Applications

Urban rain jackets, parkas, fashion outerwear, travel shells and light workwear. PU coated polyester is the standard workhorse for brands that need colour variety, predictable pricing and a garment that photographs well.

PVC: Heavy Duty Waterproofing

Polyvinyl chloride forms a completely impermeable film and remains the most protective of the common waterproof materials. It is found in industrial rainwear, fishing gear, agricultural workwear and heavy duty protective clothing where absolute protection matters more than comfort.

Advantages of PVC

PVC holds the highest waterproof rating of the five materials because the film itself is a solid barrier. It resists oils, chemicals and abrasion, can be wiped clean, and is inexpensive in high volumes. Heat welded seams produce joints that are stronger than the surrounding material, so a well built PVC jacket has no needle holes to leak.

Disadvantages of PVC

Breathability is effectively zero, so condensation builds inside during physical work. The material is heavy and becomes stiff in cold weather, which reduces mobility. Chlorine content and plasticiser migration raise environmental and product safety questions in several markets, and some European buyers now avoid PVC entirely in consumer collections.

Typical Applications

Industrial rainwear, marine and fishing protection, agricultural workwear, food processing garments and high visibility safety outerwear. For consumer fashion, PVC is usually replaced by PU or by a nylon shell with a waterproof membrane.

Nylon: Strength and Premium Performance

Nylon is the preferred face fabric for technical and premium waterproof jackets. It has a higher strength to weight ratio than polyester, resists abrasion well and takes coatings and laminates cleanly, which is why expedition shells, ski jackets and performance rainwear are usually built on a nylon base.

Advantages of Nylon

High tensile strength allows a lighter fabric to deliver the same durability, so a nylon jacket can be both thinner and tougher than its polyester equivalent. The surface accepts matte and semi-gloss coatings uniformly, creating a premium hand feel. Nylon bonds reliably with PU, TPU and membrane laminates, supporting ratings from 5,000 mm up to 20,000 mm and above.

Limitations of Nylon

Nylon costs more than polyester and absorbs more water when the DWR finish has worn off, which makes the garment feel heavier in prolonged rain. It is sensitive to prolonged UV exposure, so colours can fade in year round sun unless the yarn is solution dyed or a UV inhibitor is added. Recycled nylon is available but usually commands a price premium and a longer lead time.

Typical Applications

Technical rain shells, ski and snowboard jackets, hiking and trekking outerwear, cycling rain jackets and premium fashion outerwear. When a brief asks for the lightest possible construction at a given strength, nylon is normally the answer.

Polyester: The Affordable All-Rounder

Polyester is the most widely used base fabric in custom waterproof jacket production. It is less expensive than nylon, dries quickly, holds colour well and works with every common coating system, which makes it the default choice for large collections with many colourways.

Advantages of Polyester

Low moisture absorption means a polyester jacket dries fast and does not become noticeably heavier when wet. Colour retention under sunlight is better than untreated nylon, so bright fashion shades hold up across a season. Recycled polyester from post consumer bottles is widely available and can be certified, which supports sustainability messaging at a moderate cost increase.

Limitations of Polyester

Abrasion resistance is lower than nylon, so high wear areas such as shoulders and cuffs may need reinforcement on heavy use products. The hand feel is generally less refined, which matters at premium price points. Breathability depends almost entirely on the coating or membrane chosen, so the base fabric alone does not determine comfort.

Typical Applications

Lifestyle rain jackets, school and team outerwear, corporate uniforms, promotional shells, hospitality and event clothing, and price driven wholesale programmes. Polyester with a PU coating is the most common combination in the waterproof jacket market, and finished examples are listed in the product catalog.

Polyester versus Nylon Rain Jackets: Which Should You Choose

This is the question buyers ask most often, and the answer depends on what you are optimising for rather than on which fabric is objectively superior.

A practical rule used in development meetings: choose nylon when the product promise includes performance, lightness or a premium hand feel, and choose polyester when the product promise includes colour range, price point or delivery speed. Many collections use both, with nylon reserved for the flagship style and polyester carrying the volume colourways.

Coatings and Membranes Compared

The waterproof layer behind the face fabric determines how the jacket actually behaves. Four options cover nearly every brief.

Seams, Zippers and Finishing Details

A jacket rated at 10,000 mm can still leak through construction gaps. Three details deserve equal attention to the fabric specification.

Seam Sealing

Every needle hole in a waterproof shell is a potential leak, so critical seams need taped sealing with heat applied tape. Fully sealed garments tape every seam, while partially sealed garments protect only the shoulders and hood. State clearly which option your product requires, because the difference is visible in both cost and performance.

Zippers and Closures

Water resistant zippers use a coated coil or a polyurethane laminate on the tape. Storm flaps add a second barrier but slow the wearer down. For styles that claim full waterproofing, specify whether the main zipper is water resistant, whether pocket zippers are protected, and whether the front placket is double layered.

Hoods, Cuffs and Hem

Adjustable hoods with a wired peak, elasticated or adjustable cuffs and a drawcord hem keep water out at the openings, which is where most rain enters a jacket. These details cost little in material terms and change the perceived quality of the garment substantially.

Testing Before Bulk

Request a spray test, a water column test on the finished garment and a wash durability test on the sample. Testing the fabric roll alone does not reveal what happens after cutting, sewing and sealing, and it is the finished garment that your customer wears.

• Confirm which seams are taped and whether the hood is fully sealed.
• Specify water resistant zippers on every exterior pocket, not only the main closure.
• Request spray, water column and wash test reports for the finished garment.
• Agree the care and DWR reapplication guidance that will appear on the label.

Sampling, Lead Time and Commercial Terms

Commercial expectations for custom waterproof jackets follow the patterns below. Treat them as planning benchmarks and confirm every figure in writing before sampling begins.

Standard terms: MOQ 50 pieces per style, sample fees USD 50 to 200 deductible from bulk, 30 percent deposit and 70 percent balance.

If you are evaluating partners and comparing quotations, our OEM and ODM service page explains how a development project runs from tech pack to shipment, and the factory profile covers capacity and certification. Waterproof builds that combine sealed seams with a structured silhouette are shown in this seam sealed colour block jacket, while lighter outdoor styles are covered by the outdoor seam sealed jacket construction.

Sustainability Considerations for Waterproof Outerwear

Sustainability in waterproof apparel is mostly about coatings, because the barrier layer is where chemistry concentrates. Recycled polyester face fabrics made from post consumer bottles are now standard in mid market collections and carry recognised certification. PFC free DWR finishes are replacing older fluorocarbon chemistry, although they need more frequent reapplication. PU coatings that are solvent free or water based reduce emissions during fabric production, and mono material designs using a single polymer family make end of life recycling easier.

When a supplier claims a sustainable waterproof construction, ask for the certificate behind each claim: recycled content certification for the yarn, a chemistry statement for the DWR, and the coating formulation type. Claims without documentation create compliance exposure in the EU and North American markets.

Frequently Asked Questions