Outdoor Research Helium Jacket 100% Nylon Front zipper with inner storm flap and water resistant zippers. Front zippered napoleon pocket for safe and secure storage of your items. Waterproof and breathable 2.5-layer 20D Pertex Shield DS ripstop fabric. Single-pull hood and draw cord hem adjustment and elastic cuffs for fast convenient protection. Fully seam taped for 100% waterproof protection.