Carhartt Flame-Resistant Knit Balaclava Full-facial protection extends below the neckline HRC: 2 Face mask pulls down below the chin when not needed ATPV (CAL) Rating: 11.6 Flat-seamed construction enhances comfort Inherently flame-resistant fabric Carhartt FR label sewn on back One size fits all Meets the performance requirements of NFPA 70E standards 9.5 ounce FR knit: a blend 55% modacrylic/43% cotton/2% spandex