These snow boots are in great condition. Upper: Waterproof PU coated synthetic upper. Drawstring with barrel-lock closure. Footbed: N/A Insulation: Removable 9mm recycled felt inner boot with omni-heat® reflective lining. Midsole: 2.5 mm bonded felt frost plug. Outsole: Handcrafted waterproof vulcanized rubber shell with Sorel aero-trac non loading outsole.