Zentek is the only cooling product that does not look like medical gear. It is lightweight and can be worn even for dressy occasions. They use only the most advanced phase change materials, and eveything is machine washable. They have been exclusive to the professional dog markets, from search and rescue to AKC Show dogs. Last year the USA ICFS Agility was lucky enough to be sponsored by them. Their products are a real help when you are travelling the world with your dog and both have to arrive healthly and ready to compete.They now make matching cooling vests to their already famous dog coats. People with medical conditions that can't regulate their temperature are discovering their vests. What is so nice, is Zentek products look like normal clothing.