1.Extra-strong cushioning materials with bubble dimpe on surface. 2.Durability,multi-layers poythene film provides optimum protection against moisture resistant,puncture and tear,especially for valued items. strong cushioned poly provides a safe,attractive,economic alternative to cartons. 3.Postage savings due to much light weight and small package. 4.High-slip bubble material allows faster,easier product insert. 5.Its surface available for high-quality printing,labeling and pen writing. 6.Self-seal pressure sensitive adhesive is quick and easy to close. stong&permanent seal. 7.Wide welded edges(10mm each side)offers additional bursting strength. Material: Laser silver film Size: 150*200+40mm/150*130+40mm Usage: post/logistics express,fragile items,gadgets,little gadgets