Iconic Waterproof Winter Boots Waterproof suede, seam-sealed design, and rubber sole for grip. The ultimate winter essential boot. UPPER: Available in a waterproof suede upper with faux fur cuff or a waterproof suede upper with faux shearling cuff. Seam-sealed waterproof construction. Laces are not waterproof. INSULATION: Removable 6 mm washable recycled felt inner boot. MIDSOLE: 2.5 mm bonded felt frost plug. OUTSOLE: Handcrafted waterproof vulcanized rubber shell with herringbone outsole.