DOCO Signature O-Ring Collaris 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 DOCONylon Leash: DCSN1048, DCSN1072, DCS1148, DCS1172, DCS2048, DCB1122, DCB1148Special Features 100%highquality single-plynylonHigher tensile strength than polyesterNylon is resistance to mildew, aging and abrasionQuick & easy release plastic buckleTri-glide for easy size adjustment Heavyduty O-Ring for leash and ID tagVibrantcolors are easy to see at all times Size Chart