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  • Outdoor Research - Ferrosi Pant - Women's - Black
    Outdoor Research - Ferrosi Pant - Women's - Hazelwood
    Outdoor Research - Ferrosi Pant - Women's - Mushroom
    Outdoor Research - Ferrosi Pant - Women's - Pewter
  • Outdoor Research - Ferrosi Pant - Women's - Back
    Outdoor Research - Ferrosi Pant - Women's - Back
    Outdoor Research - Ferrosi Pant - Women's - Front
    Outdoor Research - Ferrosi Pant - Women's - Detail
  • Outdoor Research - Ferrosi Pant - Women's - Back
    Outdoor Research - Ferrosi Pant - Women's - Back
    Outdoor Research - Ferrosi Pant - Women's - Detail
    Outdoor Research - Ferrosi Pant - Women's - Detail
  • Outdoor Research - Ferrosi Pant - Women's - Detail
    Outdoor Research - Ferrosi Pant - Women's - Detail
    Outdoor Research - Ferrosi Pant - Women's - Detail
  • Outdoor Research - Ferrosi Pant - Women's - Black
  • Outdoor Research - Ferrosi Pant - Women's - Hazelwood
  • Outdoor Research - Ferrosi Pant - Women's - Mushroom
  • Outdoor Research - Ferrosi Pant - Women's - Pewter
  • Outdoor Research - Ferrosi Pant - Women's - Back
  • Outdoor Research - Ferrosi Pant - Women's - Back
  • Outdoor Research - Ferrosi Pant - Women's - Front
  • Outdoor Research - Ferrosi Pant - Women's - Detail
  • Outdoor Research - Ferrosi Pant - Women's - Back
  • Outdoor Research - Ferrosi Pant - Women's - Back
  • Outdoor Research - Ferrosi Pant - Women's - Detail
  • Outdoor Research - Ferrosi Pant - Women's - Detail
  • Outdoor Research - Ferrosi Pant - Women's - Detail
  • Outdoor Research - Ferrosi Pant - Women's - Detail
  • Outdoor Research - Ferrosi Pant - Women's - Detail
Outdoor Research - Ferrosi Pant - Women'sView Larger Image

Outdoor Research Ferrosi Pant - Women's

25% Off
$59.96 $79.95

Item #ODR00V6

Select options
  • 2/Reg
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  • 6/Reg
  • 8/Reg
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  • 12/Reg
  • 14/Reg
Quantity:
+

Tech Specs

Material:
86% ripstop nylon, 14% spandex
Fit:
regular
Inseam:
[regular] 31in, [short] 29in, [long] 33in
Leg Opening:
cinch cuff
Pockets:
2 hip, 1 cargo
Fly:
zipper
UPF Rating:
50+
Claimed Weight:
9.5oz
Recommended Use:
backpacking, bouldering, canyoneering, casual, flatwater paddling, hiking, river paddling, sport climbing, stillwater fishing, trad climbing, ultralight backpacking
Manufacturer Warranty:
lifetime

Ferrosi Pant

If you can't wear your current pants to mountain peaks, on long plane rides, and to the brewery after the crag, then it's time to upgrade to the Ferrosi Pant from Outdoor Research. Not only does the lightweight nature of the pant make it an easy choice for light-and-fast movement in the mountains, it also prevents lingering moisture from clinging close to your body for hours on end. Accidentally tip your canoe? No worries, the Ferrosi's will be dry in no time.

The all-around performance of the Ferrosi have made them a top-seller for Outdoor Research and a staple for every outdoor woman's closet-in fact, you might even want a pair in every color. At only 9.5oz, they're the perfect addition to long backpacking trips and the cinch at the cuff makes them versatile for days on the trail that start cool and hit 70 by early afternoon.

  • The perfect technical pant for, well, everything
  • Cinch closure at cuff eases transition for temperature variable days
  • Ripstop nylon protects from sharp twig ends while bushwacking
  • Cargo pocket secures valuables at the crag or on the train platform
  • Material make-up dries quickly after river crossings or canoe mishaps
  • Harness compatible waist for long multi-pitch days
  • Reviews
  • Q & A
Unanswered Question

What is the pants rise?

Great pants

  • Familiarity: I gave it as a gift but have feedback to share
  • Fit: True to size

I got these pants for my girlfriend and she really likes them. She has a pair of the Ferrosi convertible pants, but says she likes these better because the zipper on the leg can be a little bit annoying. She likes how much stretch there is to them as it makes climbing and hiking more comfortable and less restrictive. Great pants!

Perfect, but needs petite length option

  • Familiarity: I've put it through the wringer
  • Fit: True to size
  • Size Bought: large

These are everything I wanted in a pant for back country skiing, perfect in every way except too long! I can remedy some of that by shortening them from adding a seam across the thighs, but given the crotch gusset and darts for the knees, I could only take out 2 inches (I used to sew for Marmot Mt Works back in the day, so I have skills here). I need another 2 inches out of the length but with a zipper at the cuff, there isn't anything else I can do so I just roll them up when I don't have my ski boots on. OR needs to make a petite version and they'd sell a ton of these!

Hiking Pants

  • Familiarity: I've used it once or twice and have initial impressions
  • Fit: True to size

These pants are super comfortable and the fabric is breathable and durable. They fit true to size and are really easy to move around in. The drawstrings at the ankles are a nice touch as well!

My favorite outdoor pants ever

  • Familiarity: I've put it through the wringer
  • Fit: True to size
  • Size Bought: 8

I love these pants and own 6 pairs. I have worn them hiking, backpacking, rock climbing, and around town from Alaska to Texas over the last 4+ years. These pants are lightweight and have enough stretch to heel hook or high step your way to wherever you are going. The material is wind resistant and water resistant, but these features aren't as effective after a while (but I'm talking serious wear and washing over a 2+ years). I have worn these in 100+ down to 10 degree weather. That being said, these pants don't hold up if it is too cold even with a base layer, but I would say these are solid at 50 degrees or above without a base layer and 30-50 with a light base layer (full disclosure I live in a hot climate so others may have a better tolerance). I also like that while the legs will stretch a bit when you hike, the waist does not, which is a huge plus for me. I do wish they came in a short length, but the draw string at the bottom lets me shorten them when needed.
As for fit: I have a small waist and larger hips and these fit great with no gaping at the back.

Strangely Baggy

  • Familiarity: I returned this product before using it
  • Fit: True to size
  • Size Bought: 2/Reg

I'm short, and fairly straight in terms of my body type. I put these one and expected the 6+ inches of extra fabric at the hem. But, starting mid thigh these just balloon outwards. I could probably fit 2 of my calves at least in the pants where they hit.

Super weird, super unflattering. The cinchy part at the bottom becomes useless. Overall, unless there's like an X-short size, these won't work. Returned.

Fabulous product!

  • Familiarity: I've used it several times
  • Fit: True to size
  • Size Bought: 8

I've worn these hiking the hills on cool 40 degree days and worn them under rain pants for field work. I love that the fabric doesn't chafe or restrict movement. Even when damp when worn under a rain pants they are still comfortable to wear and dry fairly quickly once the rain pants come off. The fleece waist band is very comfortable and enhances the fit. I'm not thrilled about the cotton external drawstring but it works well enough.
I'm seriously thinking of buying another pair of these and getting rid of all the other synthetic field pants I have!

Best pant ever

  • Familiarity: I've put it through the wringer

I have two pairs of these pants now, and they are my go to for climbing, hiking, outdoor excursions. Nice stretch, can add a base layer underneath, zippered pockets, and the drawstring at the ankle makes these the best all around adventure pant I've ever owned. You definitely want these!

Comfortable Softshell Pants

  • Familiarity: I've used it several times
  • Fit: True to size

I needed some more fall and winter hiking pants, so I bought 2 pairs of the Ferrosi pants because I knew how great the fabric felt and how well the Ferossi line overall performed.

These fit true to size to slightly large and run long. There is no short or long inseam to choose from, so I had to get a regular. I am 5'4 and the regular was too long. The Ferrosi pants thankfully have a drawcord hem in the bottom to cinch them and keep them from dragging the ground.

They have performed really well so far this fall, as I have hiked in them in 40 degree weather and in some rain. They stayed dry in a light rain shower and were very breathable. The Ferrosi pants would also be great for climbing because they are very stretchy and abrasion-resistant.

Absolutely love these

  • Familiarity: I've put it through the wringer
  • Fit: True to size
  • Size Bought: 8

Bought a pair of these online without trying them on and absolutely LOVED them for hiking in the Dolomites in Italy. The pants fit loosely, allowing for long underwear in cooler temps. A side pocket on the left thigh for my smartphone allowed quick access for photos. The waist has two snaps (better than buttons) and can be drawn tighter with strings. I wore these pants for all but one day hiking, and simply washed them in the sink as needed. Once home, I reached for these OR pants as a go-to comfortable pair of pants for life in Boise.

Love the Style, but WAY TOO BIG

  • Familiarity: I returned this product before using it
  • Fit: Runs large
  • Size Bought: 4

Last year, I purchased the OR Ferossi shorts in a size 4 and fell in love. The material is water resistant, rugged, and I got a lot of great wear out of them.
Naturally, my next train of thought was to grab the pants in the same style. I was sure I would fall in love just as deeply.

I couldn't be more wrong. The sizing was a definite issue. Whereas the shorts provided a little room in the hips, these completely slid over my butt with the button fastened and the cord tied. I doubt I would be a 2 and quite frankly, I'd rather just return the pants.

I don't know if I received a fluke product, but these will be going back. I still love OR, but these pants are not for me.

Pro-Tip: grab two sizes to save yourself some time & return the one that doesn't fit. These pants are worth a shot, but the sizing isn't consistent.

RAD PANTS! Please make a 16??

  • Size Bought: 14

They were stretchy enough to zip, but too tight to keep. I wear a 14 or 16 depending on the brand, often a W because: Junk-in-the-trunk. So I tried the 14, and I can tell they are cut for an active use, which is AWESOME. The stretch in the fabric is incredible, and overall fit/cut is much more modern than so many other high-waisted-diaper-looking pants. The rise is a little lower, the waist band made to be perfectly flattering standing or bending, and cut with enough give for ladies with a little extra junk and/or muscle in the thighs and butt. I also like that they aren't baggy in the crotch because that generally leads to unnecessary chaffing while hiking. I just wish they made a 16. The search continues.... hard to say if they run true to size since the chart only goes to 12. For reference my hips are about 45 and natural waist about 33, and the 14 was a bit too small.

Quality Pants that fit and "work"

  • Familiarity: I've used it once or twice and have initial impressions
  • Fit: True to size
  • Size Bought: 12

The fit is perfect, they look good, move well, are light weight, and are so typical of the quality product that Outdoor Research makes.

Great for colder days and full coverage

  • Familiarity: I've put it through the wringer
  • Fit: True to size
  • Size Bought: Ten

I got these in a a size ten. I find that there is enough room for the back and thighs. The waist fits loose with enough room to move around in. I ordered the mushroom color wich is always flattering with my outdoor research pants. I've climbed in these outside. I love to wear these when it's a bit too cool for shorts. At the ankle there is some stretchy cord for tying up the extra fabric. The pants are very stretchy but do not grow bigger the more you wear them. They stay wrinkle free and water doesn't soak them. I love these!

Absolutely Love them

  • Fit: True to size
  • Size Bought: 4

Love them so much that I have 4, all different colors. They have a nice stretch to them. Great for climbing or just whatever. They would be perfect if they offered "short" sizing, as the legs are little too long for my height, but they do OK due to the drawstring elastic on the pant cuff.

Love Them but Could Love Them More

  • Familiarity: I've put it through the wringer
  • Fit: Runs small
  • Size Bought: 4/Reg

I am 5'7" but most of that is in my legs (I think my inseam is 32"). I got two pairs of these pants the Cairn and the Black both in size 4/reg. Both pairs are slightly too short but the Cairn is definitely shorter than the Black (they are supposedly the same size). Also different between the two, the black have the embroidered Outdoor Research logo on the back of the calf while the Cairn is on the waist. The embroidered logo is really itchy on my leg unless I wear tall socks under the pants. Both pairs are fairly tight on me through the thigh and hip area but then I have to make good use of the drawstring at the waist to they don't fall down.
Even with a few sizing drawbacks the pants are great. I use the black ones for work (actual outdoor research!). I do a lot of fisheries field work and often wear them under heavy rubberized raingear or waders. They provide a nice, quick dry layer that doesn't get bunched or uncomfortable under other gear. They are relatively water resistant and surprising fish slime resistant as well. I use the Cairn pair as my hiking pants while backpacking and they have yet to let my down. The provide a full range of motion and nice quickdry comfort on the trail.
Overall, I love these pants but could love them even more if the sizing was a bit better for my body.

Size too large

  • Familiarity: I gave it as a gift but have feedback to share
  • Fit: Runs large
  • Size Bought: 8/Reg

Good pant, soft, but size is different from the size chart. The waist's too large for my wife. In size chart, 8 is 71cm, however, it's measured as 84cm almost..........

So happy!

  • Familiarity: I've put it through the wringer
  • Fit: True to size
  • Size Bought: 12

I'm a girl with thighs and I was so afraid that these pants were going to have to be sent back. No chance, they fit perfect. The drawstring at the waist is really nice. I wore these pants hiking in Arches, Bryce and Zion, in and out of water, from sun, rain, and wind
they kept me comfortable every step of the way. Ordering another pair!

Love these pants Love these pants

  • Familiarity: I returned this product before using it
  • Fit: True to size

I am between a size 2 and 4 and the 2 fit perfectly. I loved the color (brown) and the feel. I was torn whether or not to keep them, but I was not looking for a boot cut ,so I returned them.

Love these pants

  • Size Bought: size 2

I loved the way these pants fit and were effortless to move in because of their stretch. I REALLY wanted to keep them but the bootcut leg was not what I was looking for. I am 5'4" 113lbs and the size 2 fit perfectly.

Outdoor Research

Women's Apparel
Alpha Sizes
 XSSMLXL
Bust

33.5in

(85cm)

35in

(89cm)

37in

(94cm)

39in

(99cm)

42.5in

(108cm)

Waist

27in

(69cm)

28.5in

(72cm)

30.5in

(77cm)

32.5in

(83cm)

36.5in

(93cm)

Hips

35in

(89cm)

37in

(94cm)

39.5in

(100cm)

41in

(104)

44.5in

(113cm)

Inseam

30in

(76cm)

30.5in

(77cm)

31in

(79cm)

32in

(81cm)

33in

(84cm)

Sleeve Length

31in

(79cm)

31.5in

(80cm)

32in

(81cm)

33in

(84cm)

34in

(86cm)

Numeric Sizes
 2468101214
Bust

32in

(81cm)

33.5in

(85cm)

35in

(89cm)

37in

(94cm)

39in

(99cm)

40.5in

(103cm)

42.5in

(108cm)

Waist

26in

(66cm)

27in

(69cm)

28.5in

(72cm)

30.5in

(77cm)

32.5in

(83cm)

34in

(86cm)

36.5in

(93cm)

Hips

34in

(86cm)

35in

(89cm)

37in

(94cm)

39.5in

(100cm)

41in

(104cm)

42.5in

(108cm)

44.5in

(113cm)

Inseam

Short 29in (74cm)

Regular 31in (79cm)

Long 34in (86cm)

How to Measure:
For best results, take measurements over your underwear.
Bust:
Measure under your arms, around the fullest part of your chest.
Waist:
Measure around your natural waistline, keeping the tape a bit loose.
Hip:
Measure around the fullest part of your body at the top of your legs.
Inseam:
Using pants that fit well, measure the crotch seam to the bottom of the leg.