MTI Adventurewear UnderDog Canine Life Jacket Ergonomically designed buoyancy aid for your canine friend 90-Percent of the flotation in the water under the chest and neck; supports the natural swim angle of the dog Rear legs allowed to sink lower than the forelegs, freeing the hind legs to swim more efficiently; neck is supported so head rides above the waterline Tough Ripstop Fabric protects the belly from rough terrain Generous reflective trim on the body and neck provide added visibility