Hyperlite Mountain Gear Southwest 40L Backpack vs Hyperlite Mountain Gear Unbound 40
Weight and specs compared for 2026 — and which one to choose.
Fully waterproof Dyneema Composite Hybrid pack with aluminum stays and foam back panel. Built for off-trail use in harsh conditions. 29.7 oz.
Check price Full details →40L Dyneema Composite Hybrid pack with internal frame and waterproof roll-top closure. Built for alpine and storm-prone conditions.
Check price Full details →Hyperlite Mountain Gear Southwest 40L Backpack vs Hyperlite Mountain Gear Unbound 40: which should you buy?
If saving weight is your priority, the Hyperlite Mountain Gear Unbound 40 wins — at 830 g it is 11 g (1%) lighter than the Hyperlite Mountain Gear Southwest 40L Backpack (841 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.