The lightweight nylon bag for climbing belts is also suitable for carrying in a backpack. For the glue to work, it is important that the glue is always clean, and belts loosely inserted into the backpack can catch dirt. In addition, the bag protects dry items in the backpack from wet belts.
The white field where you can write the name and length of the belts with an alcohol marker helps you organize and review. This way, it can't happen that you take the same ski straps with you on the tour that were left in the closet at home.