The KEVLAR interlock liner will protect the hand and fingers from sharp objects, and the neoprene and nylon spandex laminated backs allow air circulation. The synthetic leather palms provide excellent grip. Features include: 1.5 mm neoprene and nylon spandex laminated backs; hook and loop closures; 9-ounce KEVLAR interlock liner that protects the hand; digitized synthetic leather palms with non-slip cradle; terry cloth outer thumb area for wiping away perspiration. Sizing Guide: Wrap a tape measure around your hand at the widest point (usually the knuckles) and make a loose fist. Note that measurement, round it to the nearest inch. Measurements in inches: 7 (X-Small), 8 (Small), 9 (Medium), 10 (Large), 11 (X-Large), 12 (XXL).