Designed for use with Ruffwear"s Bark"N Boots, the Bark"N Boot Liners help keep your pooch prepared no matter what weather you venture out into. A poly-and-spandex blend helps manage moisture and warmth, and a tapered cuff helps keep the liners from shifting during playtime. Ruffwear recommends trimming your dog"s nails to extend the life of these liners.