Western Mountaineering
Ion Parka
Direct from the maker
Sold by the people who make it — no third-party seller in between.
Manufacturer list price (MSRP)
$830.00
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Overview
Ion Parka – Ultralight Expedition Down Parka for Extreme Cold When temperatures plummet and the wind roars across the ridge, the Ion Parka delivers expedition-level warmth without weighing you down.
Specs
- Brand
- Western Mountaineering
- Weight
- 710 g · 25.0 oz
- Insulation
- 850+ power goose down
- Fill power
- 850+ power goose down
Weight vs. category
This product25.0 oz
Category average17.0 oz
48% heavier than the category average.
How it measures up
Against every one of the insulated jackets in the RidgeNote register with a published figure. Manufacturer-listed; sources and dates are on this page.
- Weight
- 1.57 lb (710 g)
- Lighter than 14% of 14 in the register · #12 lightest
- +82% vs the median 13.8 oz
- Price
- $830.00
- Cheaper than 6% of 18 priced · #17 cheapest
- +81% vs the median $457.50 · $33.14/oz (median $37.15/oz)
The lightest of the insulated jackets on record is Zpacks Zpacks Down Jacket at 6.1 oz — 536 g less and $455.00 less.
The cheapest is Katabatic Gear Tarn Down Jacket - Men’s at $279.00 — $551.00 less.
RidgeNote verdict
Western Mountaineering Ion Parka is listed in the Insulated Jackets category. Its listed weight is 48% heavier than the category average. The manufacturer list price is $830.
Similar — lighter or cheaper
Compared with
Side by side on weight, list price and cost per ounce.
Related reading
Buying guide
Lightweight Insulated Jackets for Backpacking: Weight, Warmth and Fill Power
What fill power actually measures, why the 900-fill jacket here weighs more than the 800-fill one, and how to choose between down and synthetic. A published-specs comparison of the four jackets we carry.
Buying guide
Ultralight Sleeping Bags in 2026: How to Buy Warmth by the Gram
Temperature ratings decoded, fill weight over fill power, per-size prices across the Western Mountaineering line, the value anchor Kelty Cosmic 20, and the big Amazon names now in stock — NEMO, Sea to Summit, Mountain Hardwear and Therm-a-Rest.
Buying guide
Best Backpacking Backpacks (2026)
Six packs from 885 g to 2130 g, compared on published volume, suspension, and list price — and why fit beats every number on the page.
Manufacturer list price (MSRP)
$830.00