C.R. LAURENCE ES338XY CRL Disposable Sweat Bands. These CRL Disposable Sweat Bands help absorb perspiration, and the particles carried in it, from getting into your eyes. They also help keep the users head cool and dry when working in high humidity. The lightweight, washable sponge material is one inch (25.4 millimeter) wide by nine inches (228.6 millimeters) long. It is secured by an elasticized strap.. Part Numbers Variations: ES338XY