DOCO® VARIO Collar is constructed with HIGH quality 2mm reflective stitching nylon and high tensile force 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.