L-Plus Comfort Soft Dog Walking Harness, Red &ndash; Medium, Neck 13&rdquo;, Chest 14-21" Size: Neck 13" , Chest 14-21" , Breathable mesh is made our of 100% Polyester Please refer to the size chart image to see how to take the measurements and make sure the harness fits your dog. This harness fits medium sized dogs, please take your measurements before purchasing and dont buy based on other manufacturer sizes, if your dog is in between sizes please go for the larger size. You can wash it in the machine washer, however its more recommended to hand wash it. Adjustable chest belt size (14-21") and a quick-release buckle.