Waterproofing: Roxy Dryflight 5K with Scotchgard treated materials Weather Rating: Roxy WarmFlight 3 with 200 gram thermal insulation weather rated to -40 degrees C/-40 degrees F Duck boot inspired upper with gusseted tongue, textile shaft and heel loop for ease of entry Recycled faux fur lined shaft and footbed with squishy TPE insole for all day comfort