Design: 100% waterproof protection 5mm neoprene bootie for added comfort and performance Strategically placed rubber overlays provide additional protection along the shin and forefoot without adding unnecessary weight Heel pull tab for easy on and off In-Shoe Comfort: Thermal regulating fleece wicks away moisture 33% better than a standard synthetic fleece to maintain a comfortable temperature range Dual density footbed with memory foam for long lasting comfort bioDEWIX™Dry footbed insert topcover with NZYM™ for odor control and moisture management Lightweight EVA midsole for all day comfort and support Durability & Traction: Combining Vibram®’s all-new Arctic Grip All Terrain with XS Trek Evo and their new traction lug technology for added durability and grip on wet and dry surfaces, improving traction by up to 25% Additional Details: Comfort range: -40° to 40°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.