3000 4000 cu in backpacks page 6

Arc'teryx Khamsin 50 Backpack
$184.94 - 274.95 (-12%)
Weight: 4 lb 5 oz
Cu. In.: 3051

Lowe Alpine Cerro Torre 65
$247.46 - 330.00 (24%)
Weight: 5 lb 4 oz
Cu. In.: 5500

Lowe Alpine Airzone Centro 45 10 Backpack
$110.97 (-15%)
Weight: 3 lb 14 oz
Cu. In.: 3300

Eagle Creek Truist 55 - Women's
$149.99 - 199.95 (26%)
Weight: 4 lb 11 oz
Cu. In.: 3350

Gregory Inyo 35 Backpack - Women's
$89.95 - 99.95 (-15%)
Weight: 3 lb 1 oz
Cu. In.: 1953

Mountainsmith Mayhem 35 Backpack
$89.95 - 139.95 (-9%)
Weight: 3 lb 4 oz
Cu. In.: 2135

Selecting a Backpack

When selecting a Backpack
When choosing a new pack consider:

Trip length for sizing:
- Daypack: 2200 cu. inches or less
- 2-3 Days: 2200 - 4000 cu. inches
- 4+ Days: 4000 cu. inches or more
Internal frame, external frame, or frameless
Fit for optimizing comfort and function
Weight distribution of the pack
Hydration bladder compatibility & other features

Internal frame packs are the dominant choice for backpackers. These packs keep the center of gravity close to the user's back. An internal pack has its frame inside the pack (members of the frame are called stays). Ultralight backpackers select frameless packs to reduce weight.
Full Article