Hyperlite Mountain Gear Southwest 40L Backpack vs Osprey Exos 58 Backpack
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.
Full details →Lightweight ventilated backpack with AirSpeed suspended mesh back panel. Floating top lid, large front pocket. Great all-day comfort for summer hikes.
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Hyperlite Mountain Gear Southwest 40L Backpack vs Osprey Exos 58 Backpack: which should you buy?
If saving weight is your priority, the Hyperlite Mountain Gear Southwest 40L Backpack wins — at 841 g it is 435 g (34%) lighter than the Osprey Exos 58 Backpack (1,276 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.