Glacier Trek™ SPK outsole with 32 replaceable cleats per pair, provide excellent traction on ice and snow (NOT to be used on hard surfaces)Durable uppers are waterproof and windproofCleat wrench included with convenient internal pocket to keep wrench handy and available to change cleats on the jobAdjustable hook-and-loop strap system for a secure and comfortable fitLightweight design to help prevent foot and leg fatigueExtra large gusset provides easy on/offCompact for convenient storageIf wearing over a work or combat boot, select one size up