CoolShirt Systems cool suits have been in all our race cars from day-one...  We usually race in sunny Southern California where temps inside the car can reach 145F degrees, when having a driver cooling system is a must have item.

We've had the same CoolShirt 13qt system for 12+ seasons, only changing out the shirt from a cotton one to a SFI rated for safety reasons.  We can't recommend CoolShirt Systems equipment enough.