New! Duke University Blue Devils - Adjustable Buckle Back Distressed Cap New! Duke University - Adjustable Buckle Back Cap - Blue Devils The bill is a pre-distressed bill with factory made rips and tears. Beautifully crafted with a cotton blends and with double needle stitching by NCAA Signatures Adjustable buckle back cap. One Size Fits Most. Authentic NCAA Headwear - Officially Licensed Product.