Hyperlite Mountain Gear Southwest 55 vs ULA Circuit

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

Both weigh the same at 680 g, so choose on features, price and fit.

Spec	Hyperlite Mountain Gear Southwest 55	ULA Circuit
Weight	680 g · 0.680 kg · 1.50 lb	680 g · 0.680 kg · 1.50 lb
Brand	Hyperlite Mountain Gear	ULA
Category	Backpack	Backpack

Hyperlite Mountain Gear Southwest 55

680 g

Ultralight Dyneema 55L pack for serious gram-counters.

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ULA Circuit

680 g

Ultralight 68L frameless pack. Thru-hiker favourite.

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Hyperlite Mountain Gear Southwest 55 vs ULA Circuit: which should you buy?

On weight these two are identical (680 g), so your decision comes down to features, fit and price. Check the full details and current price for each above.

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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