100% brilliant white, pure cotton construction will not scratch sensitive surfaces Have a high degree of cleanliness, softness, absorbency and strength Can be used to safely clean microscope and camera optical parts, as well as delicate glassware, syringes, pipets, and pH electrodes Absorb six times their weight in liquids and are useful for mopping up solvents and aqueous solutions Inert to even harsh solvents; good filtering material Grade 10 (mesh size)