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Deuter Aircontact Lite 45+10 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 — 774 g lighter than the Deuter Aircontact Lite 45+10 (49% less weight). If grams matter to you, that is the one to beat.
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Spec Deuter Aircontact Lite 45+10 Hyperlite Mountain Gear Southwest 40L
Weight 1,570 g · 1.570 kg · 3.46 lb 796 g · 0.796 kg · 1.75 lb
Brand Deuter Hyperlite Mountain Gear
Category Backpack Backpack
Deuter Aircontact Lite 45+10
1,570 g

Lightweight 45+10L pack with Aircontact Lite back.

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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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Deuter Aircontact Lite 45+10 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 774 g (49%) lighter than the Deuter Aircontact Lite 45+10 (1,570 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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