Technology · eVent fabrics (Lydall)
eVent
One of the original air-permeable membranes, valued for venting moisture quickly during hard effort rather than for the softest hand-feel.
Specifications last verified 2026-09-01Independent documentation
Manufacturer specification
Published figures only — nothing estimated
- Owner
- eVent fabrics (Lydall)
- Membrane type
- Air-permeable expanded PTFE membrane
- Construction options
- 2L, 2.5L, 3L
- Waterproof rating
- Not publicly specified by manufacturer
- Breathability rating
- Not publicly specified by manufacturer
- Air permeability
- Air permeable by design; published figures vary by fabric variant.
- Typical price segment
- Varies by garment.
- Weight characteristics
- Varies by face fabric and construction rather than by membrane alone.
- Durability characteristics
- Durability is driven mainly by face-fabric denier and construction.
- DWR requirements
- Face fabrics carry a durable water repellent finish. Repellency wears off with use and needs reproofing; the membrane itself is unaffected.
- PFAS / PFC information
- Check the current season's material declaration. Many brands have moved to PFAS-free repellent finishes, and platforms differ by year and by garment.
WaterproofJacket.com assessment
Our editorial analysis, not a manufacturer claim
Main advantages
- Fast moisture transfer under load
- Long track record
- Distinctive dry-inside feel when moving
Main disadvantages
- Contamination from body oils affects performance if not washed
- Cooler in wind than sealed membranes
Best uses
- High-output hiking
- Cycling
- Cool-weather effort
Poor uses
- Static cold exposure
- Neglected washing routines
Care instructions
- Wash with a technical cleaner, not standard detergent or fabric softener.
- Reproof the face fabric when water stops beading.
- Tumble dry warm or press with a cool iron under a cloth if the care label allows, to reactivate the finish.
Sources
Official documentation and standards we relied on
- officialeVent fabrics technology