Best Use: All Conditions Built to keep your feet warm and protected in cold, muddy, and icy conditions, the HD Mud Boot is constructed of heavy-duty and insulating neoprene for added warmth, vulcanized rubber overlay for added durability, and an EVA sole for all-day comfort. The interior is lined with a premium grid-fleece for added warmth, enhanced air circulation, and fast dry time. A combination of the boot’s flexible upper and ¾ shank strike the balance of comfort and support.Designed for heavy use in muddy conditions, the patent-pending boot tread design, inspired by self-cleaning mountain bike tires, features optimally shaped and spaced lugs that disengage mud, so you don’t get weighed down. Pair that with the optimized fit of the ankle to minimize heel lift, and you have a solid system to traverse through sticky clay and deep mud.Features include durable woven pull loops, which make the boot easy to put on but also allow you to fold the boot upper down for a more rapid air-out. On the heel is an integrated kick-off tab for easy removal. The boots fit true to size with midweight socks, upsizing is recommended if you measure between sizes.With the combination of 7mm insulating neoprene, grid-fleece interior, and vulcanized overlay, they are comparable to 1000+ gram insulated boots. Product testers reported all-day comfort in a broad range of temperatures from 50 to -20 F while active, and 70 to 15°F while in the stand.