Kraft paper outside with strong 3/16" bubble lining inside. 

1.Light weight--weights less than most other brands but still performs better.

2.Superior cushioning and surface protection.

3.Extra tough bubble inside protects contents from damage during delivery

4.Finned sides&bottom--easy in/easy out for your product

5.Self-sealing, peel and seal closure---just load, peel off strip and fold over to close. Tear and puncture resistance.

6.quakeproof, push-proof and moistureproof.

Application: Be used to post tape, CD, camera lens, film, certificate, IC card, mini-type machine accessory and so on that need protecting.