100% NYLON Taslon with ""HYVET'' Finish DOUBLE FABRIC REINFORCED SEAT AND KNEES PASS-THRU OPENINGS WITH SINGLE SNAP FLAPS FOR ACCESS TO PANTS POCKETS ELASTIC DRAWCORD WITH ADJUSTABLE PULLS AT WAIST ZIPPER FLY WITH SINGLE SNAP CLOSURE AT WAIST LARGE LEGS AND CUFFS VELCRO TAB ADJUSTMENT AT ANKLE CUFF LEG ZIPPERS (ZIPPERS HAVE HYVAT PULLS) HYVAT - IS A SPECIAL 3 LAYER FABRIC THAT INSULATES, IS WATERPROOF, GIVES PROTECTION AGAINST WIND, PROTECTION FROM THE COLD, MOISTURE INFILTRATION, EVAPORATION, A