Baffin Men's Zone Snow Boot 100% Synthetic Imported Rubber sole Shaft measures approximately 7" from arch Boot opening measures approximately 15" around Waterproof snow boot featuring lightweight softshell construction with reinforced toecap and nylon shank for durability and support Lace-up vamp with speed-lacing hardware at ankle Padded tongue and collar with pull-on loops Baffin's B-Tek hollow fiber insulation rated to -4 F Cushioned EVA midsole and removable insole for comfort Grippy rubber outsole