Durable GORE-TEX fabric that can handle any weather on any mountain.The Burton AK Gore-Tex Cyclic Jacket is an outstanding shell for true mountain riders who like getting out there on a daily bases. Fully sealed with GORE-SEAM taped GORE-TEX 2L fabric, it breathes when setting steep boot packs, yet provides total waterproofing when it's puking two inches per hour.A highly functional jacket packed with features for high-performance in the backcountry and beyond. Ample venting, a systematic mapped lining, water-resistant zippers, and a rider-driven articulated fit. Burton knows how to create performance wear and this is a prime example.