Sorel Kids Yoot Pac Features: 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. Uses: Heavy Snow   Kids Yoot Pac