KIMTECH PURE W4 PreSat Alcohol WIpers are designed for ISO Class 4 or higher cleanroom environments. A 70% isopropyl alcohol and 30% deionized water solution saturates sturdy 100% polypropylene, so you'll enjoy an easy one-step application on critical surfaces. They come in a resealable pouch, with a case liner, for convenience and sanitary protection. Towel/Wipe Type: Cleaning/Disinfecting Wipes; Applicable Material: Hard Nonporous Surfaces; Material(s): Polypropylene; Chemical Compound: Isopropyl Alcohol.