With a waterproof nylon upper, seam-sealed construction and cozy insulation, cold weather doesn't stand a chance. Also, there's no need to tie these conveniently toggled laces. The inner liner with a sherpa collar is removable and washable.UPPER: Waterproof nylon upper. Seam-sealed waterproof construction. Laces are not waterproof.INSULATION: Removable 9 mm washable recycled felt inner boot with Sherpa pile snow cuff.MIDSOLE: 2.5 mm bonded felt frost plug.OUTSOLE: Handcrafted waterproof vulcanized rubber shell with Sorel aero-trac non-loading outsole.Worn gently, in very good condition