Here's some more info on Aqua Coolkeeper Collars:
Dogs have almost no sweat glands. They can only try to regulate their body temperature by panting or by perspiration through the pads of their paws. But only a small fraction of a dog's excess bodyheat can be lost this way. Therefore dogs are prone to heatstroke, which can cause permanent organ damage, a coma or in some severe cases even death.
Put your Aqua Coolkeeper™ in cold water and it will be ready to cool your dog in a minutes! Aqua Coolkeeper™ stays cool up to 5 days! Cools your dog when relieves the weather is hot, travelling, sporting and playing, outdoors, heat stress, raised body temperature, restricted airways due to heat stress
Aqua Coolkeeper™ is reusable over and over again. A quick handwash with a mild soap in cold or warm water and Aqua Coolkeeper™ as good as new
Their selling quick in our little shop and online so order yours now by going to http://www.thegroomingbarn.weebly.co.uk/aqua-coolkeeper-collars.html