While I have not used this product yet. I have to give five stars to Ruffwear's customer service. I ran out of time to exchange this product for a different size and they extended the return window, no questions asked. We are an outdoorsy family, and take our dog with us everywhere. However we also live in North Carolina, where it's not the heat that will get you but the humidity. I'm constantly worried about keeping our dog cool while still letting him be a dog outside, I cannot wait to use this during the summer!