Jiffy Rigi Bag Mailers (#1, 7-1/8-Inch x 10-3/8-Inch, Case of 250) Laminated fiberboard construction prevents movement of contents and resists bending, folding and creasing. High strength self-seal provides fast and secure closure. Convenient tear tape allows for quick and easy opening. Contains 100% recycled paper fibers, and can be recycled with mixed paper products. This product is SFI Certified.