Berkshire MicroSeal Supersorb® Lite is a highly absorbent. ultrasonically sealed, cleanroom laundered wipe recommended for critical environments rated ISO Class 3 and above. With two-ply, continuous filament polyester knit fabric, the wipe is ultrasonically bonded together. World class fiber and particle performance make MicroSeal Supersorb® Lite suitable for the most critical spill control and cleanroom cleaning applications.