WATERPROOF & INSULATED: KEEN.DRY breathable membrane keeps feet dry and comfortable by allowing vapor out without letting water in; KEEN.WARM rated -40°F/-40°C made with recycled plastic bottles works with thermal heat shield footbed for all around warmth MATERIAL & CONSCIOUSLY CREATED: Durable premium leather and breathable performance mesh deliver a fast pace; KEEN sources hides from Leather Working Group certified tanneries; Environmentally friendly DWR helps prevent leather from drying out TRACTION: KEEN.Polar Grip micro glass fiber technology creates a micro cleat effect for increased traction on icy terrain all winter long; 5mm multi directional lugs deliver added traction SUPPORT & COMFORT: Stability shank offers lightweight support for improved mobility and torsion control on uneven surfaces; Cushioned collar reduces irritation and discomfort around ankle; Shock absorbing cushioning springs back after each step FIT & CARE TIPS: KEEN Original Fit gives generous space for toes to spread out; Gently brush the boot with a soft bristle brush or hand towel to remove loose dirt and debris