Abstract: My invention, the "Hat Bob", is designed to be an independent clothing accessory item that will "fit over" the closure or adjusting strap found on the back of most "ball type" caps and hats. It's main purpose is the "cover" the opening in the back of a hat or cap above the closure or adjusting strap. It could be constructed of common materials, such as, but not limited to, cloth, plastic, vinyl, etc. It would attach securely onto the back of a hat or cap using common fastening devices, such as, but not limited to, velcro, snaps, loops, etc.(see Enclosure 7: Materials List). One of the previously mentioned designs can be constructed so that a "hidden pocket" can be formed into the "backing" of the "Hat Bob". The "Hat Bob" is easily detachable to launder or attach to another hat or cap. The benefits of the "Hat Bob", although not limited to, could include practical protection from sun, wind, rain, cold, dust, bugs, etc.