There are three optional design patterns, 5mm grid, 5mm grid, and 2.5mm grid, and four optional fabric types: antistatic ultra clean cloth, with 98% polyester + 2% conductive silk, antistatic TC, with 64% polyester + 35% cotton + 1% conductive fiber, antistatic TR, and antistatic CVC. Different type meets different requirement of static prevention and clean level.