The original "Blue-Tube" Fresh Air Systems Cool Suit! Do you need a second Cool Shirt for those full race weekends? Or just a replacement for your Fresh Air Systems Cool Suit System? These Premium grade, HANS compatible cotton t-shirts contain over 50 foot of small capillary tubing sewn onto the front and back. Note:Fresh Air Systems Cool Suit Shirts are not compatible with 2012 and later CoolShirt systems. An adapter is needed to use this shirt with these CoolShirt systems.