Review on Stay Cool and Comfortable with Glacier Tek Sports Cool Vest and 8 Nontoxic Cooling Packs by Ronald Bleimeyer

I'm sure your mileage may vary depending on use case, but I had to wear it under my very heavy, fur-covered Krampus suit. I certainly wouldn't have survived without this thing. However, after two hours the backpacks reached body temperature and I had to exchange them for another set. I don't blame the product for that. That was the nature of my use case. I think I need to find some sort of active cooling process for this suit, but as a last resort, especially if worn indoors, it works and I at least wouldn't risk wearing the suit without this vest.