The Wacky Walk'r™ is comfortable for you and your little dog. The Wacky Walk'r can stretch up to twice its length - it's the first ergonomically correct pet-walking device. Your little dog works against the leash - not you! Made of latex derived from 100% natural rubber, the same material used in the fitness industry, the Wacky Walk'r offers a high tech combination of form and functionality. The force-inhibiting stretch of the Walk'r offers a welcome relief from the "jerk" of traditional rigid leads. The center is reinforced with a safety line for added durability, support and complete control. 100% washable and deters chewing. The Wacky Walk'r™ is about 4 1/2 feet long (before stretching). In four sizes: teenie through Large.