Features:1. Super cushioning material with bubbles provides the best protection against moisture, puncture and tearing.2. Light weight, small packaging, saving postage.3. Its surface can be used for high-quality printing, labels and pen writing.4. Provide additional filling and self-sealing function, easy for anyone to use.5. The welding edge is provided to strengthen the sealing.Material: plastic foamPacking list: 100 piecesUses: Used for postal/logistics express delivery, transportation of fragile items, etc.