Hardwired for the trail, the Zeta AR is built for exploring big terrain. Protection comes from N70p 3L GORE-TEX® fabric with GORE® C-KNIT™ backer technology. This material delivers durable waterproof, windproof, highly breathable performance with a backer technology that makes the fabric exceptionally supple, quiet and comfortable. The 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.