Stay warm and active with the Winterport boot from KEEN. The leather/synthetic upper is filled with 200-gram weight KEEN.WARM insulation for lightweight, antimicrobial protection against the cold; a KEEN.DRY waterproof membrane keeps out water and allows sweat to evaporate for a healthy, dry foot environment. The dual-climate rubber outsole hardens in low temperatures for traction on packed snow. Grab heel and front loops provide easy on/off, while a quick-draw elastic cord lacing system lends a snug, custom fit. Product features include: Leather/synthetic upper, Dual-climate non-marking carbon rubber outsole, Quick-draw elastic cord lacing, Grab heel and front loops, EVA midsole, Thermal heatshield footbed, Shellback heel support, Polyurethane stability shank, Temperature rating: -25-degreesF/-32-degreesC.