HyperKewl Cooling Dog Coat Secured at the chest and under the belly, this unique vest keeps your dog cool on hot days while it runs and plays Flexible shoulder material allows the dog to move without restriction Provides 5-10 hours of cooling relief per soaking; extremely lightweight and durable Comfortable, quilted nylon outer with HyperKewl Cooling fabric inner, and water repellent nylon liner, and black poly-cotton trim Using a cooling product means that your dog does not have to expend as much of their energy cooling the body