The bubble sleeves are made of premium polyethylene. The air-filled structured bubbles protect your shipments by diverting compression from potential indiscriminate stacking and absorbing impacts from rough handling. The cushioning wrap bags can be used as bubble inserts to fill void inside a box or outside the box to prevent scratch marks or crushed corners. These bubble bags are used for shipping, storing computer parts, ornaments, trinkets, collectibles, kitchenware and many other applications.