The Swamp Cooler Zip Vest efficiently cools dogs during light and fast, high-intensity adventures through shading and evaporative cooling. The light and sleek Swamp Cooler Zip Vest uses shade-providing spandex over the back and Ruffwear’s Swamp Cooler™ tech in the chest panel for an evaporative cooling effect that disperses heat from the dog’s core. To tap into the Swamp Cooler™ tech, soak in water, zip on your dog, and go.