During those hot summer bbq days, don't let hot temps bring you down! coldfront® is the world's first personal cooling system with patented Re-cool Technology for continuous use. Perfect for on-the-go, the case is no larger than a sunglass case! coldfront's cooling gel packs provide instant relief from scorching summer heat. Just take out the palm packs and place on neck or wrist and put them back in the case to re-cool.