This FusionSilver Aluminized sleeve is made of OPF/Para-Aramid, it is straight, with an 18-inch length. It meets the standards for ASTM F955, EN 531, ASTM F1939 and is latex-free. Protective sleeves protect arms from cuts, chemical splash, dirt, and light abrasion. Sleeves start at the wrist and move up the arm and are often worn to extend glove coverage.