Comfort Range of -20ø to 75ø 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 tomove 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:Mmolded outsole - Compression molded non-pigmented gum rubber outsole- EVA midsole blocks cold and adds comfort- Removable molded EVA sockliner- Nylon shank