Baffin Men's Yoho Insulated Active Winter Boot 100% Synthetic Imported Synthetic sole Shaft measures approximately 7" from arch Boot opening measures approximately 11" around Rugged, insulated boot featuring three pull-on loops and stabilizing lace-up shaft Removable multi-layer, self-molding foam-based inner boot Cold-tested high-traction outsole with reinforced arch Comfort range between 41 F and -20 F