Features 6.2 oz. TECGEN SELECT® OPF Blend Knit, the latest carbon fiber technology. Moisture wicking and antimicrobial to help resist odors. Inherently flame-resistant fabric will not wash out, and will not melt, drip or ignite. Has unsurpassed breathability and drying rate. 6 oz. Spentex fabric has an arc rating of 13 cal/cm², CAT 2. Meets OSHA 1910.269 and ASTM F1506. UL® Certified to NFPA 2112 and NFPA 70E compliant. CSA Z462 for Arc Flash (Canada) compliant. Specify size when ordering.