Save 50% on the New Mesh Ball Cap Laundry Washing Bag White Zipper Wash. Brand New Ball Cap Wash Bag. This mesh laundry bag is the perfect protection for caps and hats. It protects cap shape and embroidered designs. Use it for standard and oversized duck-billed hats and visors. This bag is specially designed to safely wash your cap in the washer. Zipper enclosure. The safe way to clean your ball cap!