The dog's fur gets warm in summer, in the sun up to 60 degrees, the cooling vest prevents this by its cooling down up to 15° Celsius compared to the ambient temperature (The body temperature of the dog is not affected). Optimum freedom of movement: The design of the vest allows the dog to move absolutely freely and naturally. 100% dry! No wet dog fur: Only works with water, but stays dry inside and outside. Durable: Cools up to 3 days non-stop, can be reactivated over 750 (=approx. 54'000 hours, a dog's life long). Developed with veterinarians: Veterinarians know that heat puts a lot of strain on a dog's organism. This knowledge is reflected in the cani.cool cooling vest. Heat stress will be reduced significant. Light and no annoying belts or buckles. Most powerful cooling technology on the market.