The Chill-Its 6601 Lightweight Evaporative Cooling Towel is made with the same super-evaporative PVA material as our other Chill-Its cooling towels but is now 20% thinner for lightweight cooling. This super-evaporative PVA (polyvinyl alcohol) material is designed to absorb water and create a feeling colder than ambient air temperature. This neck cooling wrap can be used for hours or for quick relief and is completely reusable, just re-wet to activate. HOW TO ACTIVATE</size