1)Kraft Bubble envelope made of the composite elastic shock materials 2) self ... and easy to use5)OEM orders are welcomFeatures:bubble envelope is made of composite elastic shock materials.Functions:anti-shock ... printed in the surface. Production Process:In the inner envelope plastic membrane and the outer layer of kraft paper without ... , 15MM, 22MM, 25MM, 28MM, 30MM. Custom Kraft Paper Bubble Envelope