Moist towelettes clean dirt and perspiration off facepiece respirators with no alcohol or harsh chemicals Individually packaged and sealed to ensure uncompromised sanitary quality Disposable, one-time-use for convenience and to prevent spread of germs Convenient for respirator hygiene and sanitary protection between uses The 3M™ Respirator Cleaning Wipe 504 is used to clean 3M™ Reusable Respirators. Individually packed 8 in x 10 in (20.32 cm x 25.40 cm) towelettes are alcohol free and will not damage the facepiece materials.