Six Moon Designs
Sold by the people who make it — no third-party seller in between.
Manufacturer list price (MSRP)
$275.00
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Hiking Backpack - Six Moon Designs Swift X Ultralight 36 OZ - 1021 G Hiking Backpack. Constructed of lightweight, yet durable fabric with a thoughtful design, Six Moon Designs has created a streamlined, efficient ultralight backpack. The Swift X is ready for a quick overnight trip or a calendar year triple crown.
4% heavier than the category average.
Against every one of the backpacks in the RidgeNote register with a published figure. Manufacturer-listed; sources and dates are on this page.
The lightest of the backpacks on record is Sea to Summit Ultra-Sil Daypack at 2.5 oz — 946 g less and $225.05 less.
The cheapest is Gossamer Gear RikSak at $45.00 — $230.00 less and 879 g lighter.
RidgeNote weighs 11 ultralight backpacks against an 885 g shelf median and ranks each one by weight, price per ounce, and rank for 2026 buyers.
We rank the lightest backpacking backpacks under 200 for 2026. Compare weights and see what every ounce saved costs against the 33.4-ounce median.
RidgeNote ranks all seven Hyperlite Mountain Gear backpacks by maker-published weight, from 16.2 oz to 50.3 oz, to show what going lighter costs in ounces.
Manufacturer list price (MSRP)
$275.00