FLAME-RESISTANT CHIN STRAP: Hard hat chin strap made from flame-resistant natural fibers for added safety FLAME AND HEAT RESISTANCE: Tested to ASTM F2302-20 Clauses: 8.1 and 8.2 (Flame resistance and Heat Resistance) MULTI-POINT ATTACHMENT: 4 pin-locks ensure a reliable connection to Klein Tools hard hats ADJUSTABLE STRAP: Easily adjusts for a secure and comfortable custom fit SECURES HARD HAT: Prevents helmet slippage, ensuring optimal head protection