Glacier Trek™ SPK outsole with 32 replaceable cleats per pair, provide excellent traction on ice and snow (NOT to be used on hard surfaces) 500 Denier nylon upper with waterproof membrane 2.5 mm polyurethane internal bootie Cleat wrench included with convenient internal pocket to keep wrench handy and available to change cleats on the job Extra-large gusset provides easy on/off Perma-sole for high traction Durable and lightweight 100% waterproof Adjustable buckle strap for a tight perfect fit If wearing over a work or combat boot, select one size up Closure Type Buckle Colour Black Comfort Rating -19°C Height 11"" Material Nylon/Polyurethane