Ergodyne Chill-Its 6700 Blue evaporative FR cooling bandana gets activated by soaking in water for 2 - 5 min and remains hydrated for 4 hrs. Bandana is easy to use and ideal for construction, trade or maintenance applications. Flame Resistant Evaporative Cooling Bandana. Color: Blue. Tie closure. Modacrylic cotton blend fabric. Fabric meets ASTM F1506 performance requirements (ATPV rating of 7. 1 cal/cm2); classified HRC1 per NFPA 70E. Meets ASTM F2302 for flame resistance. Soak in water 2-5 minutes to activate. Remains hydrated for up to 4 hours. Blue. Application: Construction, trades, maintenance, landscaping/grounds, assembly/fabrication, material handling, freight/baggage, warehousing/distribution, iron/steel fabrication, petrochemical, utility crews, electrical workers. Remains hydrated for up to 4 hrs. Soak in water for 2 - 5 minutes to activate. Standards: Fabric meets ASTM F1506 performance requirements (ATPV rating of 7. 1 cal/cm2), classified HRC1 per NFPA 70E. , Meets ASTM F2302 for flame resistance. Ergodyne Chill-Its 6700 Blue evaporative FR bandana features activated polymers that offer cooling relief with FR protection and is made of modacrylic cotton fabric for durability.