PolyPure ESD Polyester Knit Wipes are made from 100% filament polyester with static dissipative fibers to control ESD. The static dissipative fibers attract and dissipate the charge, locking any residual charge into the fiber. Four edges are ultrasonic cut and sealed. The structural character of the material allows for maximum absorbency and minimal abrasion resistance. These wipes are laundered and double packaged in a class 10 cleanroom.