evo.com | Outdoor Research Insulated Pants > Toray Dermizax(TM) fabric and a 15D ripstop nylon shell make the Outdoor Research Helium UL Short Pants some of the lightest waterproof protection in the Helium UL lineup, built for fast-and-light travel when every ounce in the pack counts. Fully waterproof, windproof, and breathable, they pack down into a back pocket for storage between downpours. Ankle Zippers Toray Dermizax(TM) 2.75L 100% Nylon 15D Ripstop 61 G/M2 Shell Fully Seam Taped 15k Waterproofing Back Pocket Doubles As Stuff Sack | Outdoor Research Helium UL Short Pants Men's 2027 - X-Large Black | Nylon