Maker’s warranty: 2 year limited warranty against product failure caused by manufacturing, material and design defects; repaired when possible or replaced, case by case. Zpacks’s terms, read Oct 25, 2026
A hooded down jacket from Zpacks filled with 950 fill power Muscovy duck down certified to the Responsible Down Standard, with a Ventum ripstop nylon liner and shell treated with a PFC-free water repellent, two hand pockets and an internal chest pocket it packs into. Zpacks lists 192 g (6.8 oz) in size Medium, with 96 g (3.4 oz) of down.
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
Against every one of the insulated jackets in the RidgeNote register with a published figure. Manufacturer-listed; sources and dates are on this page.
The lightest of the insulated jackets on record is Western Mountaineering Flash Vest at 5.0 oz — 50 g less and $75 less.
The cheapest is Sitka Kelvin Aerolite Jacket at $210.00 — $165 less.
Main models on the same shelf, compared with the Down Jacket on the makers’ published figures; the tick on each bar is the Down Jacket.
Western Mountaineering
Flight Vest
0.2 oz lighter (7 g)
$50 less
Western Mountaineering
Flash Vest
1.8 oz lighter (50 g)
$75 less
Not ranked: 6 with no published weight.
Open in search →Western Mountaineering
Flight Vest
$50 less
0.2 oz lighter (7 g)
Western Mountaineering
Flash Vest
$75 less
1.8 oz lighter (50 g)
Katabatic Gear
Tarn Down Jacket (Women's)
$96 less
2.9 oz heavier (83 g)
Not ranked: 6 with no published list price.
See all 10 →What fill power measures, why the 900-fill Rab Mythic Ultra weighs more than twice as much as the 850-fill Western Mountaineering QuickFlash, and how to choose between down and synthetic. A comparison of published maker specs for seven insulated jackets.
Winter warmth comes from a system: stacked pads, insulation that copes with damp, a regulated stove and traction, built from products in our catalogue.