Your “medium” dog will appreciate your thinking about his or her safety around the pool or bathtub. This vest is made with U. S. Coast Guard approved materials. It’s designed with two body straps and one neck strap that fasten with quick release buckles. The top grab strap helps you to lift your pet from the water. (Not on Whole Dog Journal’s list of best Pet Preservers!) Fits dogs with neck circumference of 15 to 19”, chest circumference of 26 to 32”, and waist of 22 to 28”.