Made from LLDPE Polythene, Air Retention Bubbles, 30mm Top Flap with Self Seal Strip, Jiffy Brand, Each pack ordered contains 50 Bubble Bags. Bubble Bags with Self-Sealing strips. Proven to protect and cushion fragile or sensitive items during transit. Each bag has a glue strip seal to ensure the contents will not be displaced and feature air retention bubbles to prevent air loss when the pouches are subject to pressure. Manufactured from strong LLDPE polythene for added protection.