Design: 100% waterproof materials and construction for reliable protection Lace up style for a comfortable, adjustable fit In-Shoe Comfort: Fleece lining for added warmth Lightweight midsole for all day comfort and support bioDEWIX™ footbed insert topcover with NZYM™ for odor control and moisture management Durability & Traction: Vibram® Arctic Grip A.T for wet ice traction coupled with XS Trek Evo adding durability and improved grip on wet and dry surfaces Additional Details: Cosmo™ Term 200G Insulation Comfort range: -20°F to 50°F Warranty: All Rocky® products have a one-year limited warranty in normal use, against any manufacturing flaw(s), defective materials or workmanship. This warranty also covers GORE-TEX® bootie liners against leakage for one year. Products with all other waterproof construction are guaranteed waterproof for six months from the date of purchase.