Hyperlite Mountain Gear Southwest 40 vs Hyperlite Mountain Gear Southwest 40L

Weight and specs compared for 2026 — and which one to choose.

Hyperlite Mountain Gear Southwest 40L is the lighter option — 1 g lighter than the Hyperlite Mountain Gear Southwest 40 (0% less weight). If grams matter to you, that is the one to beat.

Spec	Hyperlite Mountain Gear Southwest 40	Hyperlite Mountain Gear Southwest 40L
Weight	797 g · 0.797 kg · 1.76 lb	796 g · 0.796 kg · 1.75 lb
Brand	Hyperlite Mountain Gear	Hyperlite Mountain Gear
Category	Backpack	Backpack

Hyperlite Mountain Gear Southwest 40

797 g

Bombproof DCF frameless backpack built for off-trail travel. 40L capacity with roll-top closure and durable Dyneema fabric for all-weather adventures.

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Hyperlite Mountain Gear Southwest 40L

796 g

Ultralight 40L pack in Dyneema Composite Fabric with roll-top closure, hip belt pockets, and a structured back panel for comfort on demanding trails.

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Hyperlite Mountain Gear Southwest 40 vs Hyperlite Mountain Gear Southwest 40L: which should you buy?

If saving weight is your priority, the Hyperlite Mountain Gear Southwest 40L wins — at 796 g it is 1 g (0%) lighter than the Hyperlite Mountain Gear Southwest 40 (797 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.

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