Products engineered with GORE-TEX® fabric are durably waterproof and windproof, combined with optimized breathability — enduring products that maximize protection and comfort for the wearer. The GORE-TEX® membrane is an extremely thin layer of expanded polytetrafluoroethylene (ePTFE). It has over 9 billion pores per square inch. It's these pores that give the GORE-TEX® fabric its characteristics. Not only are GORE-TEX® products built to last, they are easy to care for. Routine care will ensure excellent performance and extend their useful life. Be sure to follow the manufacturer’s care instructions ─ typically found on the inside tag.