Reengineering our proven work boot comfort system, we've taken Quad Core technology and redesigned it specifically for hunting boots. For the first time ever, our Quad Core 4layer comfort platform system has been integrated into the 4xBurly that features uncompromising scent free and waterproof protection, now with uncompromising underfoot comfort and support. Features All natural handcrafted rubber Uncompromising scent free and waterproof protecction Contoured AnkleFit design to prevent heel slippage Adjustable back gusset and strap with adjustable fit for various leg sizes Added rubber abrasion protection in toe, heel and shin 1200G Thinsulate Ultra Insulation for those needing protection in extreme cold environments Dual density molded PU and sponge rubber footbed QuadCore technology featuring four layers of cushioning and support 3 layer sponge rubber midsole 4xBurly outsole for superior traction in snow, mud and loose terrain 1200 grams of Thinsulate Ultra Insulation Realtree AP camouflage 18" height 6.5 lbs Rated for temperatures as low as 50