WATERPROOF & INSULATION: The KEEN.DRY waterproof, breathable membrane keeps your feet dry and comfortable all day long by allowing vapor out without letting water in; KEEN.WARM recycled PET insulation with thermal heat shield rated to -25°F/-32°C TRACTION: KEEN.FREEZE rubber outsole provides high-traction grip in cold environments and on rocky surfaces with 5mm multi-directional lugs; Non-marking rubber outsoles leaves no trace or imprints when walking indoors SUPPORT & COMFORT: External stability shank (ESS) and 5mm multi-directional lugs offers lightweight support for improved mobility and torsion control on uneven surfaces; Cushioned collar reduces irritation and discomfort around ankle ODOR-PROTECTION: All KEEN products feature a natural, pesticide-free probiotic-based technology called Eco Anti-Odor technology for breaking down odor in sweat CARE TIPS: Gently brush the boot with a soft bristle brush or hand towel to remove loose dirt and debris; Treat stains by lightly rubbing a gum eraser in a circular motion over the location and lightly brush afterward