Built-in Microban, antimicrobial product protection. Fights odor-causing bacteria, mold and mildew! Lifetime Antimicrobial Protection. Wipes, mops, sponges and the products we use to clean our homes can become breeding grounds for microbes. Microban antimicrobial product protection inhibits the growth of odor causing bacteria, mold, and mildew. Microban protection is built-in during manufacturing, so it provides continuous antimicrobial protection that won't wash off or wear away for the life of the product. Premium blend cotton yarn. Looped ends for durability. 10 year limited warranty: With the exception of the wet mop head, this product is warranted against defects in materials or workmanship for 10 years from the date of first purchase when used for normal household use. If at any time during this period the product fails due to a covered defect, Quickie Manufacturing Corp. will repair or replace it at their discretion with the same product (or an equivalent) at no charge. You must pay any shipping charges related to return of the product. Refill No. 0231.