Ergodyne Chill-Its 6700CT PVA Evaporative Cooling Bandana is with a topnotch phase transition PVA material to soak up wet and provide heartbeat cooling relief. Can be for hours or for active relief. reclaimable, just to activate. for alfresco 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.