Hyperlite Mountain Gear Southwest 55 Backpack vs Hyperlite Mountain Gear Unbound 55
Weight and specs compared for 2026 — and which one to choose.
Robust ultralight pack with Dyneema Composite Hybrid fabric and two aluminum stays. Ideal for technical terrain and variable weather conditions.
Check price Full details →Internal frame pack made from Dyneema Composite Hybrid fabric with 55L capacity. Designed for thru-hiking with weather-resistant roll-top lid and comfortable su...
Check price Full details →Hyperlite Mountain Gear Southwest 55 Backpack vs Hyperlite Mountain Gear Unbound 55: which should you buy?
If saving weight is your priority, the Hyperlite Mountain Gear Southwest 55 Backpack wins — at 850 g it is 3 g (0%) lighter than the Hyperlite Mountain Gear Unbound 55 (853 g). That said, the heavier option may justify the extra grams with more capacity, durability or comfort, so weigh the trade-off against how you'll use it.
See where both rank against everything else in this category on the lightest backpack page, or browse the full gear weight database.