The Web Reaction Collar is a martingale collar with buckle for easy on/off and reflective Tubelok webbing. The limited-cinch martingale function is popular among dogs who have a knack for backing out of traditional collars. The Web Reaction is packed full of Ruffwear's signature collar features: separate ID tag attachment point, a silicone tag silencer, and strong and comfortable webbing that holds its color.Materials: