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. Envelope Size: 6 x 10 Envelope/Mailer Type: Padded Closure: Self-Adhesive.SEL55445. 55445. Sealed Air Sealed Air Jiffylite Self-Seal Mailer.