Waterproof nylon upper with PU coated overlays Waterproof breathable membrane Microfleece Lining Lace-up fastening Tread in comfort with these gorgeous waterproof snow boots from Sorel. Ideal for chilly and wet weather, these boots are crafted from waterproof nylon with a breathable membrane for comfort. A luxurious microfleece lining keeps your feet toasty and protected from the snow.