Combining an ultra-tough and waterproof build with lightweight, sneaker-like comfort, the Back40 Boot redefines tall boot performance. Low-bulk 800g Thinsulate(TM) insulation regulates temperature throughout the season&&';;s changing weather, maintaining comfort throughout demanding hunts and long days of work. The fully waterproof rubber and neoprene construction, strength-enhancing toe and heel rubber overlays, and terrain-chewing traction make this an icon of dependable durability. Comfort range: -20 AdegF to 40 AdegF Dimensions: 18" height, 17.6" calf circumference (size 10) Weight: 42.5oz per boot (measured in a size 10)