The Zeta LT delivers weather protection during extended trekking and backpacking trips. Lightweight, comfortable and compressible, it is made from N40p-X 3L GORE-TEX fabric with GORE C-KNIT™ backer technology. This material delivers longwearing waterproof, windproof, highly breathable performance with a backer technology that makes the fabric exceptionally supple, quiet and comfortable next to the skin. The Arc’teryx Trim fit keeps the shell close to the body to improve the fabric breathability, but leaves room for light layers. Articulation in the sleeves and gusseted underarms provide freedom of movement.