The Swamp Cooler Zip Cooling Vest is the GOAT! I initially bought the vest with the snap closure, and it was good for our Corgi, but she outgrew it. So, this time around, I bought the zip version. Wow! I love the stretchy material and that it is form fitting to her, and I believe it keeps her cooler than the original one we bought. She is double-coated and mostly black and really minds the heat. Putting this vest on her definitely puts the spring back in her step. Thank you, Ruffwear, for making such great products!