NEW! Purdue University Boilermakers - Adjustable Back Embroidered Cap - Black NEW! Purdue University Boilermakers - Velcro Back Embroidered Cap - Black Xtreme Fanz Headgear Beautifully crafted with a cotton blends and with double needle stitching by The Game. Adjustable Velcro Back Cap. One Size Fits Most. Officially Licensed Product.