... stiffness and a puncture resistance bubble mailer2)High-slip bubble lining for easy product insertion;Bubble lining for effective air retention ... and packingself seal kraft bubble envelopesRemarks:i:be used to post tape,CD,camera lens,film,certificate,IC card,mini- ... on goods that need protection.ii:PE bubble film inside and craft paper outside.The bubble film is directly coalescing to the craft ...