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. heel height: 1/2 in. platform height: 1/4 in. lace length: 24 in. please note: laces and zippers incorporated in sorel footwear are not waterproof. Sorel in nylon/polyamide and polyester Faux fur (polyester) Imported Sizing Note: Toddler sizes end in "T"; Youth sizes end in "Y". Toddler sizes are smaller than youth sizes.