KEEN.DRY waterproof/breathable membranes keep feet dry while dissipating sweat and moisture PFC-free, DWR (durable water repellent) treatment sheds moisture off the surface Waterproof leather uppers with thermal fleece linings keep feet dry and warm KEEN.WARM insulation provides additional wintertime warmth Easily adjustable hook-and-loop tarsal straps let kids secure the fit to their liking, allowing for an easier on and off Thermal Heat Shield insoles with Eco Anti-Odor technology help prevent the growth of odor-causing bacteria Nonmarking rubber outsoles provide traction on wet surfaces In great preloved condition with clean Velcro. No Smoking Chihuahua Friendly House Feel free to make an offer. If you have any questions feel free to in the comments section below. ~🛍🛒Happy Poshing🛒🛍~