The first and most important thing is
packaging. Often people think that a box is just a shell, the main thing is the product inside. And this is a big mistake. Packaging is protection, armor, without which even the most durable product may not survive transportation conditions.
It does not matter what you are transporting - electronics, fragile glass or clothes - everything should be packed as if it is going to be thrown, wet or crushed. Because it can happen. No one will treat your cargo gently in warehouses. It must be ready for harsh reality.
Think about internal shock absorbers. Bubble wrap, foam, thick pads - all this is necessary. Even if the product is soft or seems strong, do not spare money on additional protection. It is much cheaper than compensation for a damaged batch.