Waterproof and Warm Snow BootsPerfect for deep snow. Waterproof upper, felt inner boot for warmth, and multi-directional lug sole for steady grip. Easy on and off.UPPER: Durable water and wind resistant PU backed synthetic textile upper. Built in gaiter with barrel lock closure system and fixed elastic instep strap.INSULATION: Synthetic insulation. Removable 6 mm washable recycled felt inner boot.MIDSOLE: 2.5 mm bonded felt frost plug.OUTSOLE: Injection molded waterproof thermal rubber shell with multi-directional lug outsole for enhanced traction.Size 3Boots have been used but have many more snow days still to come. Please note, both boots have a small waterproofing treatment applied near the strap where there appeared to be a little fraying starting. There was no leaking, tearing, or other issue at the time but we wanted to ensure the boots remained watertight for the next person to enjoy. It's a clear (shiny) epoxy from REI and we've zoomed in to show detail in one picture.2401-66E