Those vests can be very effective. I use a coolshirt system in my track car, and I can be in the car indefinitely on a 100F day with no a/c, as long as the pump is recirculating ice water through my suit.
Those vests can be very effective. I use a coolshirt system in my track car, and I can be in the car indefinitely on a 100F day with no a/c, as long as the pump is recirculating ice water through my suit.