Designed for those pups who tend to slip out of traditional collars, the Ruffwear Chain Reaction Collar utilizes colorful Tubelok webbing and a limited-cinch martingale buckle to make sure you best friend stays close. The Martingale design helps prevents dog from slipping out of traditional collars. The aluminum V-ring and stainless steel O-ring provide reliable attachment points. The Quick Ring allows you to quickly add or remove tags, and the collar features a separate ID attachment point. 100% polyester. Imported.