We cannot stress how important we think having a Cool Shirt system installed in your racecar is. Although racers have been performing without them for ages, their mainstream availability to the grassroots racing crowd has allowed drivers to stay cool in the cockpit, which translates into staying focused, which translates into maintaining focus and being consistent. It's a proven fact that maintaining a consistent, comfortable body temperature in any stressful activity (they also make these systems for spinal surgeons) will help you stay focused and not lose concentration because you have gotten overheated. We race in Florida, so having a Cool Shirt system is a necessary item for us to be able to race anytime from March to December, but ask anybody who has tried a Cool Shirt system before if they liked having it and if it kept them more comfortable. We guarantee they will vigorously say "YES!".