This RaceQuip SFI 3.3 rated double layer base layer hood, also called a balaclava or head sock, is knit from a blend of aramid and FRC fabrics to achieve a comfortable fire retardant garment. The properties of this unique fabric structure create a lightweight fabric that performs like Nomex yet is much more cost effective. The Fire Retardant Cotton (FRC) component of the fabric promotes a soft and supple lightweight feel. Since it's hypoallergenic, it won't irritate your skin like some other materials tend to do. This proprietary fabric blend is also superior at wicking away mositure from the skin and dries quickly. Seams are flat sewn and strategically placed to avoid pressure points and promote comfort. All RaceQuip fire retardant base layer garments are machine washable and retain their shape well. This hood is a two layer, one eyeport design with a long bib in the front. Exceeds SFI 3.3 rating and one size fits all adults. A youth hood is also available.