Sealed Air Jiffy Rigi Mailers, Fiberboard, Size 5, 10-1/2 x 14 Inches, 150 per Carton, Kraft (SEL49392) 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.