Dogline MaxAire Multi-Purpose Mesh Dog Vest with GUARD DOG Removable Patches. These vests are perfect for service dogs, training dogs, therapy dogs, medical alert dogs and much more. The MaxAire vest is made of a lightweight, yet strong mesh that breathes to keep your pet comfortable. In fact, it is one of the lightest service animal vests on the market and is ideal for warmer climates! Vest offers a reflective stripe on both sides along with the ability to affix 2 side patches. The vest features adjustable straps and a stainless steel D-ring for leashes and ID tags. This vest is also easy to put on and take off with help of a quick release buckle. Please measure your dog's girth behind front legs at the widest point before ordering. Please see sizing picture for further instruction.