Ware Walk n Vest Small Pet Harness and Leash, Medium, Assorted Colors One Ware Walk n Vest Small Pet Harness and Stretchy Leash, size medium Medium vest is perfect for ferrets or guinea pigs The safest and most comfortable small pet harness and leash Provides a safe and comfortable way to walk your small pet Comes with a free finder bell that makes it easy to keep track of your pet's location