Superior Barrier Bubble 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. This product was made using wood sourced from a certified managed forest. Envelope/Mailer Type: Cushioned/Media; Envelope Size: 4 x 8; Closure: Self-Adhesive; Trade Size: #000.