DOCO® O-Ring Collar is made from high-quality nylon and plastic fittings. The unique distribution of the fully integrated O-ring allows for easy leash attachment. The design ensures a breakaway system that holds the lock and allows you to reattach the collar before your dog frees itself from the collar. Identification ring for attaching your pet's ID. Feel safe and comfortable with the collar. *Matches with DOCO® Nylon Leash: DCSN1048, DCSN1072, DCS1148, DCS1172, DCS2048, DCB1122, DCB1148 Special Features - 100% high-quality single nylon - Higher tensile strength than polyester - Resistant to mold, aging, and abrasion - Quick and easy-release plastic buckle - Tri-glide for easy size adjustment - Heavy O-ring to hold the leash and ID tag - Bright colors for easy visibility at all times Size Chart