My dog is a black, long haired big german shepherd. He does not do well in the Connecticut summer heat and humidity and would prefer to stay indoors.
This vest keeps him cool enough that we can continue hikes and walks, especially under the shade of the trees in the woods. I still watch for signs of distress and with this vest he can be outside longer without showing any signs of the beginnng of distress.
Definetly worth the money and peace of mind for your dogs wellbeing.