quality:corruption, structural:expansion, information:classification, quality:correction
A baseball cap is a type of soft hat with a rounded crown and a stiff bill projecting in front. The front of the hat typically displays a design or a logo. The hat may be "fitted" to the wearer's head or the back may have elastic, a plastic prong-in-a-hole, Velcro, a zipper, or a tri-glide slide so that it can be quickly adjusted to fit different wearers' heads. The baseball hat is a part of the traditional baseball uniform worn by players, with the brim pointing forward to shield the eyes from the sun. Since the 1980s, varieties of the hat have become prevalent in the United States and many other nations, both for utilitarian and fashion accessory purposes.