With 40 liters of internal (main packbag) volume and about 9 liters of external (pocket) volume, the Hyperlite Mountain Gear Unbound 40 Backpack is targeted primarily to summer thru-hikers needing to carry up to about 4 or 5 days of food.
Other features of note:
- DCH50 main body & DCH150 bottom
- Removable hip belt with daisy chains (for modularity) and zippered stash pockets
- Internal frame – single aluminum stay with a shaped plastic polyethylene framesheet and 1/8-inch high density foam
- External side pockets are sized larger than other Hyperlite Mountain Gear backpacks for additional storage volume and easier access
- Roll-top closure
- Removable side compression straps
- Exterior-bound seams provide (claimed) improve water resistance
- Exterior 1/4-inch daisy chains provide several options for modularity and gear lashing
- Large dual-entry front pocket (made with Dyneema Stretch Mesh) provides access to smaller items without interfering with the contents of the main pocket
- Bottom pocket (made with Dyneema Stretch Mesh) provides quick access to additional storage for snacks, rain jacket, etc.
