Hendrick MotorsportsIt started as a bit of a mystery: how did the cooling shirt end up in NASCAR? I'll never forget Chad calling me, 'You won't believe it, this cool shirt thing works! The helmet hose doesn't have the same impact as the cooling shirt considering the latter's surface, though. Shane van Gisbergen freezes his cool shirt before a race to amplify its cooling capabilities. Reddick's praise, though, is the perfect way to sum up the cooling shirt in NASCAR.