Lincoln Electric Welding Doo Rag | Flame Resistant (FR) | Mesh Inside Liner | Black & Red | K2993-ALL PREMIUM FLAME RETARDANT (FR) FABRIC  The Doo Rag / Skull Cap is made from ASTM D6413 compliant 9 oz. FR black / red cotton which prevents and extinguishes fire / flames. The fabric also has an anti-mildew and anti-static coating for added longevity and protection. SWEAT ABSORBANT LINER  The inside of the headwear is lined with a soft athletic mesh which absorbs moisture and help prevent hair pulling. SUPERIOR COMFORT - The lightweight FR material is breathable by design. This allows consistent airflow to keep you cool without sacrificing protection. ADJUSTABLE FIT  This Headwear features a tie closure design which can be adjusted to your desired fit. USED BY PROFESSIONALS  This headwear is used by professional fabricators on a daily basis.