CoolShirt Systems. Whether you need a 13 quart or 19 quart system - with or without a cooling shirt - only a helmet blower for times when a cooler just won't fit, a combo kit with cooler and blower, or a portable system when permanent mounts aren't an option, CoolShirt has what you need to stay cool. For the ultimate compact, weight saving option - CoolShirt offers a unit requiring no ice! Not only does this save on weight and space, it can run for a virtually unlimited time making it ideal for endurance racing. For any racer looking for a cool solution on hot race days, CoolShirt systems have what you need to stay focused and cool on the track.