Ergodyne Chill-Its 6700CT PVA Evaporative Cooling Bandana is lined with a super evaporative PVA material to soak up moisture and provide instant cooling relief. Can be used for hours or for quick relief. Reusable, just re-wet to activate. Great for outdoor activities, camping, yoga, baseball, softball, soccer, running, biking, days at the beach or on a boat, golf, landscaping, yard work, construction job sites, fishing, gardening, hiking.