Stay warm in frigid conditions in the LaCrosse Alphaburly Pro 18-Inch Side-Zip 1000g boot. Scent free and waterproof, this men's knee-high Alpha Construction boot has an all-natural, handcrafted rubber upper over bi-directional, air-circulating neoprene, with 1000 grams of Thinsulate™ Ultra insulation for a cozy interior. A contoured fit at the ankle reduces slippage; an adjustable side gusset accommodates different leg sizes. The cushioning EVA insole can be removed and replaced with a personal orthotic for customized comfort. The LaCrosse Alphaburly Pro 18-Inch Side-Zip 1000g outdoor pull-on hunting boot is finished with a non-tracking Burly® Pro rubber outsole for dependable traction over a range of terrain and conditions.