Preowned, excellent condition 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 age