Versatile performance winter boot engineered for aerobic activities and everyday wear. OmniTrax 3.0 Interchangeable Sole System adapts your traction to meet changing weather conditions. Includes two outsoles - SnowTrac Winter Rubber Lug and IceTrac Studded Rubber Lug with carbide studs (32 studs/pair). 100% waterproof construction includes waterproof/breathable bootie, and waterproof leathers, webbing and stitching to keep boot interior perfectly dry. 200 grams of critical 3M Thinsulate insulation in toe and tongue supplies needed warmth for outdoor use without overheating your foot during indoor use. Molded heel cap provides support and protection without sacrificing flexibility.