Made of lightweight plastic material, the cap insert is sturdy and comfortable for breathing. With good workmanship, delicate, lightweight, use this cap insert to keep your baseball cap in a good condition when not in use, meeting your needs well. Features -Color:Transparent -Material:PVC -Size:21.00X21.00X14.00cm/8.25X8.25X5.50in -Note: Hat circumference:57CM - These cap inserts are comfortable and fit for most caps, protecting hats from deformation. - Hat inner support is made of safe plastic material, which is practical for lasting- time use. - Plastic hat support, make caps convenient to storage, suitable for various seasons and occasions. - Great for storing and displaying baseball caps and sports hat, keeping your hat in a good condition. - Large quantity of cap inserts are great for families or teams, great for personal use or teams use. Package list: 12 x Hat Holders