Buy Caps and Hats Shriner Hat Baseball Masonic Shriners Mens Black Baseball Cap Bumper Sticker Quality Embroidered letters and images. Black Shriner Cap and Masonic Bumper Sticker by Buy Caps and Hats. Adjustable velcro strap to fit most men head sizes. Honeycomb mesh fabric that is great for warm/hot conditions as it is a very breathable material.