Cold Chain Aluminum-coated Air Column Bag -Patented non-printing air valve -High brightness, smooth surface, puncture resistance -Used with other refrigerant packs, with long-term cold preservation -Ships flat, stores flat, and inflates on demand -Requires significantly less storage space than traditional bulky materials -Reduces overwrapping -Simple operation improves packing efficiency and saves labor costs -Customizable colors: silver/gold/color optional, beautiful appearance -100% Recyclable -Improve your brand image and good experience when opening boxes.