Superior Barrier Bubble(R) air cellular cushioning offers great protection. Fully laminated, heavyweight Kraft construction delivers outstanding rip and puncture resistance. Seamless bottom provides extra strength and stability. Self-adhesive closure produces a secure, peel-and-press seal. Envelope Size: 4 x 8; Envelope/Mailer Type: Cushioned; Closure: Self-Adhesive. Includes 25 mailers.