The Snowmotion 8 keeps things moving no matter the conditions. Bomber build and smart design multi-sport ready and styled for terrain highs and lows. Proprietary Air Cushion midsole lends an absorbing hand, and Polartec and Primaloft insulations ward off cold spells. Waterproof Construction. Double Density TPU Waterproof Shell. Waterproof Leather upper. Front Zip Entry with Baffle Tongue. Polartec 200 Thermo Insulation Lining with Aegis. 400 grams of Primaloft Insulation with Aegis. Waterproof Leather Upper with Polyester/Nylon Mesh Bellows Tongue. TPU Backstay with Snowshoe Strap Ridge. 9.5mm Webbing Lacing System. Front Gaiter D-Ring. Coldproof Ortholite Insulating footbed. Activeheat Insole with Silver Reflective Film Between Insulating Polyester Layers. Grade 4 Tapered Nylon Insole. Compression Molded EVA Footframe. Merrell Air Cushion Midsole. 6mm Sole Lug Depth. Vibram Thermo 6 Sole/Trek Dura Rubber. Comfort Range to -40F/-40C.