How to Choose a Backpack

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Moving fast with an ultralight load? Enjoy your time on the trail with the Mountainsmith Zerk 40 pack, which was designed with renowned thru-hiker and triple-crowner The Real Hiking Viking.
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View all Mountainsmith Backpacking Packs| Best Use | Backpacking |
|---|---|
| Frame Type | Frameless |
| Ultralight | Yes |
| Gear Capacity (L) | 40 liters |
| Gear Capacity (cu. in.) | 2,440 cubic inches |
| Weight | 1 lb. 14 oz. |
| Fits Torso Length (in.) | 16-19 inches |
| Fits Waist/Hips | 28-48 inches |
| Material(s) | 210-denier EXTREEMA recycled nylon ripstop (UHMPE); recycled 210-denier nylon SD oxford; nylon 100-denier x Span 840-denier stretch mesh |
| Number of Stays | 0 |
| Reservoir Compatible | Yes |
| Pack Access | Top |
| Number of Exterior Pockets | 9 + main compartment |
| Dimensions | 18.5 x 11.75 x 5.75 inches |
| Gender | Unisex |
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Used to do everything from Colorado 14s and alpine climbs !!!
Well made. The optional top straps are a tight fit. Worry them in well before need. The belt keeps the pack close and makes using the side pockets easier. Thought is required. Then it's a beautiful thing.