The women's NIKISKI 503 Boot by Columbia is a runner profile built for the winter, with mobility, lightweight construction and warmth. The waterproof suede and textile upper covers 100g of insulation and a fleece lining for warmth-trapping comfort. A waterproof membrane bootie construction wraps your foot snug. The lightweight midsole makes for a durable, flexible step. Traction rubber at the outsole steadies the ride.