Dog Gone Smart Jacket with Ecru Piping for Dogs Regular jackets have 100% cotton canvas outer shells, fleece lining on the inside and ecru piping NanoSphere fabrics repel liquids, dirt, coat oils and stains so these jackets stay clean naturally! This fabric finish is now being used by some of the worlds leading outdoor sportswear brands. The NanoSphere treatment makes the fabrics highly abrasion resistant, making the jackets much more durable. Dog Gone Smart Technology reduces the spread of bacteria which can cause doggie odor as well as bacterial infections and allergies, creating a healthier environment for your dog. The dogs skin flora is not negatively affected. Polyfill insulating material helps keep your dog warm and dry. Adjustable neck and belly velcro closures assure just the right fit. Protective finish remains functional even after 50 washing cycles. Fabrics dry much faster than traditional fabrics.