Stretchy, breathable material, absorbs & evaporates sweat 8 times faster than an average cotton sweatband. Keeps sweat from dripping down into your eyes and face. Super slim & lightweight (weighs less than half an ounce). Temple Tape Sweatbands fit virtually every head size and shape. All Grip, and No Slip. Fits under all helmets, hard hats, & caps without adding any bulk.