Dog Gone Smart Collar NanoSphere fabrics repel liquids, dirt, coat oils and stains so products stay clean naturally! The NanoSphere treatment makes the fabrics highly abrasion resistant, making the collars, leashes, and harnesses much more durable. Dog Gone Smart Technology reduces the spread of bacteria which can cause odor, bacterial infections, and allergies. Neoprene core provides soft feel Eliminates chafing associated with nylon