Hyperlite Mountain Gear Southwest 40L Backpack vs Liteway Biggie Pack 45L
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 →Frameless ultralight 45L backpack at 680g (590g without cords), durable ECOPAK material construction
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Hyperlite Mountain Gear Southwest 40L Backpack vs Liteway Biggie Pack 45L: which should you buy?
If saving weight is your priority, the Liteway Biggie Pack 45L wins — at 680 g it is 161 g (19%) 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.