The FAST Cooling Cotton Cool Suit Shirt is the original — the premium grade 100% cotton driver cooling shirt that started the cool suit category and has been the choice of professional drivers for over 20 years. With over 50 feet of medical grade capillary tubing across the front, back, and shoulders, HANS-compatible construction, and Zone Cooling technology delivering four equal cooling zones, it remains the most straightforward and proven way to stay cool in a race car. Compatible with FAST Cooling systems via quick release medical grade connectors.