For the most part when it is wet this coat did keep my dog cool. The problem with it is on hot sunny day it dries out very very quickly. My girl is about 90% black so finding something that will help cool her for summer activites is very important to me. The plus side to it is that when she does wear it she has a very fast recovery time. She doesn't pant nearly as much with it on when it is wet. Also in her case after a few minutes in the shade she is ready to go. This is a good product and I would recomend it, but make sure you have plenty of water to keep it "recharged." Also the instructions tell you to ring it out after getting it wet. If you are in the sun a lot don't bother, I found it kept her cooler longer.