THERMAL HEAT SHIELD FOOTBED CAPTURES WARMTH DUAL-DENSITY EVA MIDSOLE FOR LIGHTWEIGHT CUSHIONING KEEN.FREEZE RUBBER OUTSOLE FOR TRACTION IN COLD CONDITIONS 4MM MULTI-DIRECTIONAL LUGS FOR TRACTION EXTERNAL STABILITY SHANK DELIVERS LIGHTWEIGHT SUPPORT KEEN.DRY WATERPROOF, BREATHABLE MEMBRANE KEEN.WARM INSULATION RATED TO -25 F/-32 C Eco anti-odor for freshness