Poly binder features a lightweight, flexible cover that lasts longer than vinyl. Accohide covers make this round-ring binder ideal for heavy-duty use. Exceptionally durable, the binder still maintains flexibility to easily fit into tight spaces. Tearproof, durable Accohide cover also offers a matte-finish for a professional appearance. Snap loose-leaf documents into the three metal round rings. Binder also includes exposed rivets.