The Cumulo tech shell delivers premium waterproof breathability, performance and protection for all the conditions the mountains can throw at you. Features include soft, stretchy and quiet 100% ripstop nylon fabric, fully seam-sealed construction for complete waterproof protection, pit zips for breathability, adjustable hood, adjustable drawcord hem and hook-and-loop/elastic cuffs. 2.5-Layer Merrell Opti-Shell waterproof, breathable fabric keeps you dry and comfortable.