• Waterproof Construction
• Waterproof Synthetic Leather Upper
• Waterproof Synthetic Leather/Polyester Mesh Bellows Tongue
• Merrell conductor fleece
• 400 Grams Of Thinsulate™ Ultra Insulation
• M Select™ FRESH naturally prevents odor before it starts for fresh smelling feet
• TPU Backstay With Snowshoe Strap Ridge
• 7.5mm Narrow Gauge Webbing/Integrated Leather Loop Lacing System
• Coldproof™ Insulating Footbed
• In-Board™ Compression Molded Eva Footframe With Grade 4 Tapered Nylon Insole Molded To Bottom
• Air Cushion™ Midsole
• 6mm Sole Lug Depth
• Vibram® Chameleon Thermo™ Sole/Trek Dura Rubber
• Comfort Range to -40F/-40C