Ferrosi Jackets & Pants
The stretch-woven Ferrosi softshell line is Outdoor Research's most recognized piece, the do-everything layer climbers and hikers reach for in place of a hardshell.
Explore Ferrosi →Brand profile
Outdoor Research
Seattle-based maker of technical outdoor apparel and accessories, from gaiters and gloves to Helium rain shells and Ferrosi softshells.
SeattleOrigin
UnisexFocus
Gorpcore / OutdoorStyle
$$Price
21 brands like Outdoor Research like Black Diamond, Mountain Hardwear, Marmot →
What to know about Outdoor Research
Started with a gaiter, not jackets
Ron Gregg launched the company in 1981 with the X-Gaiter, and gaiters, gloves and mittens are still core categories rather than afterthoughts to the outerwear.
Known by product names, not logos
Shoppers come for specific pieces: Helium rain shells, Ferrosi softshell jackets and pants, sun hoodies and wide-brim hats.
Alpine-use spec at mid prices
Garments are built on proprietary AscentShell and GORE-TEX fabrics for climbing, ski touring and paddling, with a separate tactical line for military and professional users.
The pieces that define Outdoor Research
Shop Outdoor Research →Helium Rain Shells
Ultralight, packable Helium shells built on the brand's proprietary waterproof fabrics defined Outdoor Research's reputation for minimalist emergency rain protection.
Explore Helium shells →Gaiters & Gloves
The company was founded on the X-Gaiter, and gaiters, gloves and mittens remain the categories it is still best known for in the mountains.
Explore gaiters →Shop Outdoor Research
Shop all Outdoor Research ↗Available atHatchet Outdoor Supply Co.
How Outdoor Research fits
Overall fit
true to size
Most shoppers report Outdoor Research pieces land true to size with a trim, climbing-oriented cut, so athletic builds fit well while broader chests and layerers often prefer one size up.
Tip: Order your usual size for a technical layering fit, but size up if you want a midlayer or puffy underneath or prefer a relaxed drape.
Medium confidence · based on 16 sources
By category
| Category | Runs | Shape | Size advice |
|---|---|---|---|
| Hoodies & sweatshirts | slightly small | slim, athletic sun-hoodie cut with a close hood and thumbholes | Consider sizing up in the Echo/ActiveIce sun hoodies if you want airflow or a looser feel. |
| Shirts & overshirts | true to size | trim to regular with an articulated, active cut | Stick with your usual size unless you carry a broader chest, in which case go up one. |
| Trousers & pants | true to size | athletic through the seat and thigh with a slightly tapered leg | Take your measured waist size; heavier-legged wearers may want the next size up in Ferrosi. |
| Jackets | true to size | trim technical shell shape with articulated sleeves and a helmet-compatible hood | Buy your normal size for a shell over a fleece, or size up if you plan to layer a puffy underneath. |
| T-shirts & graphic tees | true to size | regular to slightly trim, straight through the body | Take your normal size; only size up if you dislike a body-skimming tee. |
Directional fit consensus summarized from public sources with AI — a starting point, not a guarantee. Confirm with the product's own measurements before buying.
If you like Outdoor Research
See all 21 brands like Outdoor Research →
86% matchBlack Diamond
Climbing-first hardgoods plus gloves and shells
What changes: Heavier on hardware — cams, skis, headlamps — than apparel
85% matchMountain Hardwear
Same alpine-technical shells and insulation, less accessory depth
What changes: No glove/gaiter heritage; corporate-owned
80% matchMarmot
Comparable price, down and rain layers for hiking
What changes: More general-hiking than alpinism-focused
78% matchMontane
Fast-and-light UK take on the same layering system
What changes: Skews trail running and ultralight racing
Outdoor Research fit questions
Does Outdoor Research run big or small?
Outdoor Research fits true to size. Order your usual size for a technical layering fit, but size up if you want a midlayer or puffy underneath or prefer a relaxed drape. Most shoppers report Outdoor Research pieces land true to size with a trim, climbing-oriented cut, so athletic builds fit well while broader chests and layerers often prefer one size up.
How does Outdoor Research fit?
Most shoppers report Outdoor Research pieces land true to size with a trim, climbing-oriented cut, so athletic builds fit well while broader chests and layerers often prefer one size up. Overall shape: trim athletic outdoor fit, closer to the body than most American brands but not compression-slim.
How do Outdoor Research hoodies & sweatshirts fit?
Outdoor Research hoodies & sweatshirts fits slightly small. Consider sizing up in the Echo/ActiveIce sun hoodies if you want airflow or a looser feel. Shape: slim, athletic sun-hoodie cut with a close hood and thumbholes.
How do Outdoor Research shirts & overshirts fit?
Outdoor Research shirts & overshirts fits true to size. Stick with your usual size unless you carry a broader chest, in which case go up one. Shape: trim to regular with an articulated, active cut.
How do Outdoor Research trousers & pants fit?
Outdoor Research trousers & pants fits true to size. Take your measured waist size; heavier-legged wearers may want the next size up in Ferrosi. Shape: athletic through the seat and thigh with a slightly tapered leg.
Brand facts
Outdoor Research makes technical apparel and accessories for alpinism, rock and ice climbing, backcountry skiing, hiking and paddling. Physicist and mountaineer Ron Gregg founded it in Seattle in 1981, starting with the X-Gaiter, and gaiters, gloves and mittens remain core categories alongside Helium rain shells, Ferrosi softshell jackets and pants, sun hoodies and wide-brim hats. The privately held company builds around proprietary AscentShell and GORE-TEX fabrics, sells direct and through outdoor specialty retailers, and runs a separate tactical line serving military and professional users.
- Founded
- 1981
- Origin
- Seattle, United States
- Made in
- United States
- Price
- $$
- Focus
- Unisex
- Facts checked
- September 2026
- Styles
- Gorpcore / Outdoor, Techwear, Athleisure / Sportswear