Extra layers of protection provide unsurpassed warmth on the coldest days! Comfort Range of -50° to 65° F. 100% waterproof top to bottom, feature a 5mm Densoprene® Foam insulated bootie to keep out the cold & Wet and keep in the warm & dry, Hydrokote® water repellent so water rolls off and dries in seconds. 4-way stretch breathable airmesh lining to move the air and keep your feet dry and comfortable, roll-down calf pipe to tuck in your pant leg or vent in warm temperatures, only genuine hand-laid rubber (no PVC, PU or TPR), reinforced tuck board with rigid shanks for superior stability, slipper soft comfort and sized to athletic shoe standards, and convenient back-pull tabs for easy-on/easy-off convenience. In addition to these standard Dryshod features this boot features: • DS1 molded outsole - outer and inner grip • 6 layers of protection + EVA cold-blocking midsole = 7 layers • Extra layers of insulating warmth and protection! 5.5 mm bootie; 2.5 mm DENSOPRENE XD foam (extreme density) for extra protection; 2 mm airmesh; 2 mm warm fleece lining • Removable molded EVA sockliner • Double achilles heel and instep reinforcement for comfort and protection • Nylon shank