Our NASA Worm Red Text Embroidered Iron On Patch Washed Denim Snapback Cap is a 6-panel constructed hat made of 100% Cotton with an integrated cotton sweatband and a retro flat bill. Add a little vintage flair to your style with this plastic snapback! 100% Cotton. Washed Denim. Plastic Snapback. Retro Flat Bill. High Crown. One Size Fits Most.