Absorb sweat and stay cool by wearing these bandanas around your head or neck. They meet NFPA 70E and ASTM F1506 standards, so they’re safe to wear when sparks are flying. To keep you cool, they contain water-absorbing crystals. Run these bandanas under cold water for a few minutes, then the crystals will relieve heat through evaporation for up to 4 hours. They're made of a soft, breathable cotton and modacrylic blend that resists flames and protects against radiant heat.