Hey, Linc. High humidity will prevent many cooling vests from working properly (living in Atlanta, I know all about 90-degree days with saturated air).

Some owners have had success throwing their cooling vest in the freezer before using it on their pup. This way, it works more like a cooling blanket, instead of relying on evaporation to cool your canine.

But a frozen (or nearly so) vest may be too cold for some dogs (particularly those with short or thin fur), so be sure to consult with your vet first.

Let us know if you figure out anything that works!