RedHead Deluxe Neoprene Dog Vest in Realtree Max-4 Camo. Durable chest guard made with real Kevlar to give your dog added protection from hazards in the field; briars, thorns, cactus tines, and barbed wire. Constructed from strong, lightweight neoprene rubber. Trim and cut construction allows for a great fit every time. Adjustable velcro "hold tight" closure system, reinforced seams for long wear. Imported. Dog Vest Size Chart: M: 17'' Neck, 26'' ChestL: 18'' Neck, 28'' ChestXL: 19'' Neck, 31'' Chest2XL: 20'' Neck, 33'' ChestSizing Instructions: 1) Measure your dog's neck (about 3'' down from the base of the skull). 2) Measure around your dog's chest (about 1'' behind the front legs all the way around). 3) When measuring, be sure to keep the measuring tape snug for a good, accurate measurement. 4) Choose the largest dog vest closest to your measurements – the velcro closure will allow for some adjustment.