But the Trail Builder from EVOC gives you a whopping 30 liters of storage c. The backpack is made of the best materials that make it comfortable to wear, even if there is a lot of weight in the bag. The bag can be used for every imaginable purpose Features: Attachment system for: axe, hammer, hedge clipper, chain saw, protectors (storable) Nail wrap (separate, detachable) Tool compartment (separate, reinforced) Separate section for wet items Hip belt pocket Compression belts (4 on the side)