NEOS 15" Navigator 5 Expandable Waterproof Winter Overshoes (N5P3) Windproof and waterproof 840 woven polyester upper protects against water, snow, sleet, rain and wind gusts; lightweight design helps prevent foot and leg fatigue Expandable gator increases boot height to 20 inches for added protection against snow and rain; compact for convenient storage; 4 mm polyurethane foam insulation ensures warmth in extreme temperatures; adjustable hook-and-loop strap system ensures secure fit Vibram Ninja outsole with deep tread ensures traction on snow, ice and rugged terrain; optional 10 mm removable EVA insole adds comfort (sold separately) Recommended use: construction, transportation, utility, fish & game, oil and gas, farming and equestrian, outdoor general purpose