| Material | Expanded polyethylene (ePE) |
| Key benefit | PFAS-free (of concern) |
| Also | Thinner & lighter |
| Keeps | Waterproof, windproof, breathable performance |
The GORE-TEX ePE membrane is Gore’s waterproof-breathable membrane made from expanded polyethylene (ePE) instead of ePTFE, developed to be free of PFAS ‘forever chemicals’ of concern. It’s also thinner and lighter while keeping durable waterproof, windproof, and breathable performance, marking Gore’s shift toward more environmentally responsible materials.
The sustainability angle
It makes Gore-Tex PFAS-free without losing breathability — part of a broader move tracked by standards like bluesign.
Frequently asked questions
What is the GORE-TEX ePE membrane?
It's a newer Gore-Tex membrane made from expanded polyethylene (ePE) rather than the traditional expanded PTFE. Gore developed it to eliminate PFAS of environmental concern while remaining durably waterproof, windproof, and breathable — and it's also thinner and lighter than the classic membrane.
Why is ePE important for sustainability?
Traditional ePTFE membranes and many DWR finishes have relied on PFAS — 'forever chemicals' that persist in the environment and are increasingly regulated. The ePE membrane lets Gore-Tex deliver its performance without those PFAS of concern, aligning with industry and regulatory moves toward PFAS-free gear.
Does ePE perform as well as regular Gore-Tex?
Gore designed ePE to meet its durable waterproof-breathable standards, and it has the bonus of being thinner and lighter. As with any membrane, real-world performance depends on the garment's construction tier, but ePE is positioned as a like-for-like, more sustainable replacement in many products.
Sources
- GORE-TEX ePE membrane — W. L. Gore & Associates
- PFAS in textiles — bluesign