The ULTRAS. All-Season, All-Terrain Dog Boots: the ultimate performing boot. Made of 3 layers of high-performance technical materials; Our patented technology form-fitting gel acts as a glove on paws for extreme comfort, our waived rib fabric stretches up to 3 times its size and guarantees better mobility and the rubber anti-skid sole provides superior shock absorption and protection from harsh soils and debris. The ULTRAS are sold in packs of 2. While front paws are larger than back paws, a larger size for the front paws are recommended.