K1 Race Gear's K1 Cotton Head Sock is made of 100% cotton to absorb perspiration. Designed with an open face for improved visibility. The F1 Style features a reverse stitched design to increase driver comfort. You won't find a more comfortable balaclava than this one. Available in Blue, Red and Black.. Keep your Helmet Clean * Machine Washable * 100% Cotton Absorbs Moisture * Reverse Stitch for Maximum Comfort