The Arc'teryx Alpha AR 55 is a backpacking backpack with 55 L of capacity and an internal frame. It weighs 2 lb 14 oz, and lists at $250.
BackpackingType
InternalFrame
GearScore64/ 100Overall, on the default algorithm
MSRP$250list price
Value Score61$3.94 / ptBang for buck: price per GearScore point
GearScore breakdown
How this backpack earns its 64 on the default algorithm, factor by factor
Have specific needs in mind, like the lightest pack for a thru-hike, the most load-carry for a heavy winter kit, or the best value? Rank this backpack against every other on your own custom scoring algorithm.
Open the full backpack comparison →Specifications
| Type: | Backpacking |
|---|---|
| Frame: | Internal |
| Access: | Top-load |
| Material: | Nylon |
| Capacity: | 55 L |
| Weight: | 2 lb 14 oz1.30 kg |
|---|---|
| Max load: | n/s |
| Denier: | 315 D |
| Torso range: | 16.7 to 20.3 in42 to 52 cm |
| Price: | $250 |
How scoring works
The same GearScore engine the comparison pages use. This is the default weighting; open the full comparison to re-weight it around your trip.
GearScore blends published specs into one 0 to 100 number. Capacity is a "good enough" gate; weight, rated load, and fabric denier score on a sliding scale. Price is a lever presets turn on.
Customize on the full comparison →Capacity34%
Weight34%
Load carry16%
Denier16%
Price0% · lever
- Sufficiency
- Only needs to be good enough. Capacity works this way: enough volume to carry your trip and the pack is set, extra liters add no points.
- Monotonic
- More (or less) is always better. Lighter beats heavier, a higher rated load beats a lower one, and tougher fabric beats thinner, so they score on a sliding scale.
- Preference
- Type and frame are personal preference, never scored. They only filter the list.