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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
Could not be verified from the accessible official documentation
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 depends on the textile, laminate, seams, use and care; denier alone does not establish abrasion resistance.
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

  • Follow the garment label and official care instructions. Use the specified cleaner; Gore permits a small amount of suitable liquid detergent for conventional GORE-TEX outerwear. Avoid products those instructions prohibit.
  • For DWR-finished garments, clean first and reproof only if needed, following garment and treatment instructions. Do not apply DWR to persistent-beading constructions such as SHAKEDRY.
  • 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