My Japanese Chin is so much happier and cooler! I bought one for my small Japanese Chin. As her fur is thick and her face quite flat, she can't regulate her temperature well. She loves playing and running outside and was getting too hot, finding it hard to cool herself down. Since wearing the vest for walks and playtime she is so much happier and doesn't get too hot. Gives me peace of mind for sure! Kirstin Cuthbert