2B1ASK1 Mason Baseball Cap 2B1 ASK1 Freemason Black Hat Mens Masonic 2B1 ASK1 Hat and Bumper Sticker by Buy Caps and Hats. Adjustable velcro strap to fit most men. Vent holes to help head breath. Embroidered stitching. Durable fabric that resists fading, stains and moths.