When shade is low and the mercury is high, dogs can count on the Swamp Cooler(TM) Vest to help keep the adventure going. Strategic material choices and design offer solutions for the challenges that hot-weather exploring presents. The light-colored fabric reflects solar radiation, while wetting the vest activates our Swamp Cooler(TM) Tech for that refreshing, just-stepped-out-of-a-lake feeling also known as evaporative cooling. Just give it a soak, put it on your dog, and go. When it dries, re-soak it to recharge it. Wicking outer layer: reflects heat, facilitates evaporation to disperse heat, and offers UPF 50+. Absorbent middle layer: stores water for evaporation. Mesh lining: keeps dog dry and comfortable. Side-release buckles for easy on/off Leash portal on back is compatible with most harnesses Vest style fit for maximum cooling coverage and shade Reflective trim for visibility in low-light conditions and light loop for attaching The Beacon(TM) Materials Outer Layer (bluesignA(R) approved): polyester air mesh Middle Layer: polyester felt Lining (bluesignA(R) approved): dry-weave polyester mesh Buckles (bluesignA(R) approved): ITW Nexus Waveloc side-release Zipper: YKK Vislon Made in Vietnam