Ergodyne Chill-Its 6717FR Fire Resistant Cooling Hard Hat Neck Shade LONG LASTING INSTANT COOLING RELIEF Can last for up to 4 hours on a single soak. Re-soak to increase cooling duration EASY TO USE AND ACTIVATE Soak in ice water 2-5 minutes or until plump , ring out excess water, and it's cool! Attach to hard had suspension for cooling relief as temperatures rise. FIRE RESISTANT Made with modacrylic cotton blend fabric that meets ASTM F1506 performance requirements (ATPV rating of 7.1 cal/cm2); classified HRC1 per NFPA 70E. Meets ASTM F2302 for flame resistance DURABLE AND REUSABLE Product can be re-used over and over again. Just re-soak to activate HAND WASH Use mild detergent, rinse and blot dry