The Jet Stream uses the simple concepts of evaporative cooling and shading to efficiently cool your dog from the heat of blazing sun or high-intensity adventures. The 3-layer chest panel is brilliant: the inner layer transfers cool feel to the skin, the absorbant middle layer soaks in and stores water, and the wicking outer layer pulls body heat to the surface where it can evaporate quickly. Spandex provides shade over the back with a UPF rating of 50+ to minimize heat penetration. Just soak the Jet Stream in water, wring out, pop it on your dog, and you are ready for any warm weather adventure! Great bright colors too! Super easy to put on with just one zipper...no velcro or buckles, and your dog will forget she's wearing anything at all. Made in Vietnam.