The G-FORCE Racing Gear SFI flame-retardant Balaclavas are the softest and most comfortable head socks on the market today. Made from an innovative soft knit CoolTec Nomex material, our balaclava gives the driver or crewmember hypoallergenic coverage with a soft texture feel and a minimum TPP rating of 10. The balaclavas are available in single or double layer. Single layer balaclava comes with one large eye port. The double layered balaclavas are available in single or duel eye port versions.