Innerzone Nomex HeatSleeve helps protect the goggles from heat and the elements Reflective patch NFPA 1971 compliant The ESS Innerzone Nomex HeatSleeve helps protect the goggles from the elements when not being worn, keeping them clean, scratch free, and buffered from heat. ESS recommends this accessory for its Innerzone and FirePro-1971 structural goggles.table.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }