Singing with The Black Folder is so easy. Made from pressboard and covered in a durable leatherette it's loaded with extras like an aluminum hinge, brass rivets for durability, expanding pockets, reinforced brass corners, 10 elastic cords for holding music in place, a handy pencil loop, and a cross strap across the bottom of the folder to keep loose music from slipping out. On this version the cross-strap is detachable on one side to allow full opening of the Folder. The Black Folder was originally designed for the Los Angeles Master Chorale.