B-Tek Dry Waterproof; Removable Tri-Fit multi-layer inner boot system; Polywick lining for moisture transfer and evaporation outside of fabric; Hi-Density Insulation layer; Vapourized Aluminum Membrane for energy reflection and heat regulation; Nylon locking snow collar to protect from the elements; Fully moulded Arctic Rubber upper provides lightweight flexibility, cold resistance and resilience; Lightweight and flexible Thermoplastic elastomer (TPE) compound; Self-cleaning outsole for convenience