Pure W5 Dry Wipers Deliver A Delicate Cleaning Solution For Sensitive Environments. Disposable Wipers Assist With Critical Tasks In Clean Rooms (Approved Iso Class 5 Or Higher) And Pharmaceutical, Biotechnology And Medical-Device Industries. 50/50 Polyester-And-Rayon Blend Gives Wipers Cloth-Like Feel. High-Absorbency Wipes Come In Anti-Stat, Double-Bagged Packaging.