Staying cool after a workout or on a hot day is easy with this innovative product! Simply Wet, Wring, and Wear, the PVA material allows cool air to stimulate cooling, wearing a wet towel can lower your core temperature. PVA Material is a hyper-evaporative material that’s the latest in cooling innovation. This Poly Vinyl Acetal (PVA) material retains water while remaining dry to the touch to provide cooling relief.