The Opal Gal Pals Go Mist uses Phase Change Material technology to keep the pads cool even at room temperature - no refrigeration required! These Gal Pals are designed for on-the-go cooling, they can be tucked into your bra for cooling relief that's skin-safe and soothing. The cooling material features a plant-based phase change material that re-cools at room temperature. Pack in your purse, gym bag for diaper bag for cool comfort whenever you need it. Get fridge-free relief for hot flashes. Chill your chest after a workout and treat heat stress. Portable pain relief for headaches, fevers and first aid. Gal Pals Go are reusable and stay cool for around 30 minutes, Safer than ice or gels. Latex-free. Made in America. Comes in a pack of 4.