SOREL Men's Blizzard Xt-m Snow Boot PU Coated Synthetic Upper Imported Rubber sole waterproof pu coated synthetic upper with drawstring and barrel-lock closure removable 9mm recycled felt inner boot with omni-heat reflective lining 25mm bonded felt frost plug midsole handcrafted waterproof vulcanized rubber shell with sorel aero-trac non loading outsole sorel rated -40 degrees fahrenheit