The kind of packaging you choose for the item you are about to ship is very important as it may mean the difference between that package arriving in one piece and that packaging arriving to its destination in pieces. If you are going to ship something which is more on the fragile side then you may need to use a combination of packaging materials like say plastic, a cardboard box, or perhaps packaging foam rolls that will also help to keep it safe while in transit. These packaging foams come in many shapes and sizes and rolls is just one of the many forms you can find packing foam in. You can find this foam in the form of sheets and you may even find it in a can in the form of sprays. This is pretty fancy you may say but foam, in all its incarnations, is really just to provide cushion to avoid cracks and dents.
There are some products, mostly of the electronic kind, which will require you to get some custom-made foam packaging material to ensure a snug fit for better protection. These custom-made foam products are cut with the use of machines so they can get the proper measurements for the product to fit snugly into the foam pieces. There are also the foam densities to consider when looking at packaging foam. Just remember that the higher density the foam the more cushioning and protection it can offer, but one downside is that it will also be a bit more expensive.