Product Information If youre searching for rugged winter boots for men, go for Kamik's Nation Plus. Whether youre out shoveling the night after a snowstorm or taking the kids tobogganing, these warm winter boots will keep your feet comfortable and dry. Featuring seam-sealed waterproof construction, and HEAT-MX insulation for extra warmth. Product Features Comfortable down to -40F Leather is from a tannery rated gold for its water, energy, and waste management practices Moisture wicking lining Removable HEAT-MX 145 sustainable thermal insulation liner Seam-sealed waterproof genuine suede upper SNOWTREAD outsole with deep, self-cleaning treads for stability in snowy conditions Waterproof and flexible synthetic rubber shell Waterproof gusset tongue