With a waterproof membrane serving as an impermeable barrier against the elements, and 200g of thermal insulation providing warmth, the Storm Trekker 8s were built for those who dont wait for sunny days to go hiking. Suede upper. TPU waterproof shell. 200g thermal insulation. Waterproof membrane. Bellows tongue keeps debris out. 200g Conductor fleece lining. EVA midsole provides cushioning. Molded nylon arch shank. Merrell Air cushion in heel absorbs shock and provides stability. Merrell MRS 545 outsoleSticky Rubber. Imported.