DOCO® Signature O-Ring Collar is constructed with HIGH quality nylon and plastic fittings. The unique placement of the fully welded O-Ring allows for easy attachment for a leash. The design ensures a breakaway system that catches the buckle and allows you to re-fasten the collar before your dog is freed from the collar. ID ring for attaching your pets identification. Feel safe and secure with the collar. *Match with DOCO® Nylon Leash: DCSN1048, DCSN1072, DCS1148, DCS1172, DCS2048, DCB1122, DCB1148 Special Features 100% high quality single-ply nylon Higher tensile strength than polyester Nylon is resistance to mildew, aging and abrasion Quick & easy release plastic buckle Tri-glide for easy size adjustment   Heavy duty O-Ring for leash and ID tag Vibrant colors are easy to see at all times Size Chart