Can wash most caps in the top rack of your dishwasher.  This rack helps to block / shape the cap so it keeps its form during washing and drying.

Keep your caps looking clean and fresh with this Ball Cap Buddy Cap Washing Rack. Designed to safely and effectively clean your caps, this cap washing rack is made from high-quality plastic material to ensure durability and long-lasting use. With a height of 6 inches, length of 12 inches, and width of 9 inches, it can accommodate most cap sizes. The black color adds a touch of style and sophistication to your laundry area. Perfect for those who want to keep their caps in pristine condition without worrying about damaging them during the washing process.