Maker’s warranty: Lifetime warranty against defects in materials and workmanship; covers original owner; modifications without ULA’s approval void it; tune-ups and repairs for a fee. ULA Equipment’s terms, read Oct 25, 2026
The Circuit with a torso adjustable from 12 to 18 inches, a carbon-fiber and Delrin suspension hoop, a single aluminum stay and a foam frame. ULA lists 68 L (4,200 cu in) and 36.6 oz (1,038 g), with loads under 35 lb (16 kg).
Figures with a source link to the page they were read from, with the date we checked it.How we get these figures →Wrong figure? Tell us
Packs are sized by torso length, not height. How to measure yours →
Against every one of the backpacks in the RidgeNote register with a published figure. Manufacturer-listed; sources and dates are on this page.
Main models on the same shelf, compared with the XS Circuit on the makers’ published figures; the tick on each bar is the XS Circuit.
ULA Equipment
30L Patchless Ultra Dragonfly
9.2 oz lighter (261 g)
$10 less
Gossamer Gear
Mariposa 60 Backpack
3.2 oz lighter (92 g)
$15 more
ULA Equipment
36L Patchless Ultra Dragonfly
5.6 oz lighter (159 g)
$20 more
Not ranked: 2 with no published weight.
See all 62 →
NEMO
Resolve 25L Daypack (Women's)
$120 less
0.4 oz heavier (11 g)
Six Moon Designs
Swift V
$25 less
0.7 oz lighter (20 g)
Gossamer Gear
Aero Jet
$75 less
0.8 oz lighter (22 g)
Not ranked: 34 with no published list price.
See all 48 →Ultralight backpacks ranked by maker-published weight: 40 models. Lightest: Gossamer Gear Murmur 36 Hyperlight Backpack (Aluula) at 7.9 oz (225 g).
Six backpacking packs from 45 to 68 L: how to fit one, then their published volume, frame, load range, weight and list price, with a reason to skip each.