Sewing is an old fashion crafting way of creating clothes. You can easily create this amazing design by yourself. If you have a little experience you can use zippers and craft the exact model for yourself. On the other hand, if you do not have enough experience, first you need to learn how to sew then start this craft.
If you can, you can also change the colors of the bag, and even improve the design by yourself. Who knows, maybe next time we will be commenting on your design of bags. This will be a great looking bag when finished.