Paww Secret Agent Collar, Medium, Black Stash pocket: Straight from the 007 gadget lab, the on-board stash pocket lets you store a couple of ID tags, keys, or emergency pick-up bags Comfort: Light but tough mesh lining breathes to keep your dog cool when the heat is on; Plush nylon material is more compliant that webbing for maximum comfort Buckle and D-ring: Curved quick-release buckle rests more comfortably against your best friend's neck Burly steel D-ring keeps you in control Materials: Double rip-stop nylon, nylon webbing, and polyester mesh Medium neck range: 12 to 16-inch (30 to 40cm)