Tested - it really works! After 2 hours, the butt is still wet. The dog came back briskly after a walk in the sun. But there are nuances. Bought for two dogs of different sizes with extra size. In the end, they came in small sizes and fit tightly. The main problem is to put it on the head, because... There are no adjustments here. So measure the neck diameter and head diameter and take the larger of these sizes.
The rings for attaching the leash to the butt are very thick and small leashes do not fit into the carabiners. I had to put a key ring on one butt.

The vest arrived exactly as ordered, bought size M. For our French bulldog, it's too tight in the neck. They gave it to the seamstress, she fixed everything. Already tested on the street, satisfied.

It works. the loaf cools well

Gorgeous cooling butt vest. Thanks to the manufacturer, this is just a godsend for our Frenchman. It tolerates heat very poorly. The heat has arrived and our dog is grateful to us. I recommend buying it if you also have such a problem.

Perfect size, very comfortable. It gets very wet. It arrived very quickly