Sanitizer indicator towels are designed to effectively eliminate the risk of cross-contamination and foodborne illness for food service establishments. Yellow towel turns blue when saturated with effective, germ-killing sanitizer formula; turns yellow again when sanitizer is depleted. Towels can be recharged again and again. Recharged towel can be used up to eight hours or until it will no longer recharge to blue when resupplied with sanitizer solution. Towel/Wipe Type: Sanitizing Towels; Application: Sanitization; Foodservice; Applicable Material: Hard, non-porous surfaces; Color(s): Yellow/White/Blue.