REI Co-op Swiftland Thermal Running Tights - Women's
This product is not available. Good news: we have a newer version.
Built for trail running, the women's REI Co-op Swiftland thermal running tights offer range of motion for changing terrain and compression pockets that hold essentials but won't hinder your stride.
Shop newer version- Durable, stretchy nylon/spandex fabric has a brushed back for added warmth, wicks moisture, and is quick drying to keep comfort a priority
- Drop-in compression pockets on each thigh carry what you need; stash your keys and card in the internal waistband slip pocket; 2 additional waistband pockets even the weight
- Internal waist adjustment holds tight in place as you move and makes for a customized fit
- Crotch gusset improves range of motion
- Reflective hits front and back help you stay visible in low-light situations
- REI Co-op brand is certified to The Climate Label; we actively fund efforts to reduce carbon emissions across our business and support climate projects around the world
- Contains materials that meet the bluesign® criteria
Imported.
View the REI Co-op Swiftland Product LineView all REI Co-op Women's Running Tights| Best Use | Trail Running Running Fitness |
|---|---|
| Fabric | Shell: 71% nylon/29% spandex (bluesign® approved); lining: 86% polyester/14% spandex |
| Reflective | Yes |
| Moisture Wicking | Yes |
| Quick Drying | Yes |
| Pants Rise | Mid |
| Tights Length | Ankle Length |
| Inseam (in.) | 28 inches |
| Number of Pockets | 5 |
| Gender | Women's |
| Sustainability | Contains materials that meet the bluesign® criteria From a Climate Label Certified brand |
| XXS | XS | S | M | L | XL | 1X | 2X | 3X | 0 | 2 | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 18W | 20W | 22W | 24W | 26W | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Numerical Size | 00 | 0-2 | 4-6 | 8-10 | 12-14 | 16 | 18 | 20-22 | 24-26 | 0 | 2 | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 | 22 | 24 | 26 |
| Bust | 31 | 32-33 | 34-35 | 36-37 | 38.5-40 | 41-42.5 | 43-45 | 47-49 | 51-53 | 32 | 33 | 34 | 35 | 36 | 37 | 38.5 | 40 | 42.5 | 45 | 47 | 49 | 51 | 53 |
| Sleeve Length | 29.5 | 30 | 30.5 | 31 | 31.5 | 32 | 32.5 | 33.5 | 34.5 | 30 | 30 | 30.5 | 30.5 | 31 | 31 | 31.5 | 31.5 | 32 | 32.5 | 33.5 | 33.5 | 34.5 | 34.5 |
| Waist | 24.5 | 25.5-26.5 | 27.5-28.5 | 29.5-30.5 | 32-33.5 | 34.5-36.5 | 37.5-39.5 | 40.5-42.5 | 44.5-46.5 | 25.5 | 26.5 | 27.5 | 28.5 | 29.5 | 30.5 | 32 | 33.5 | 36 | 38.5 | 40.5 | 42.5 | 44.5 | 46.5 |
| Hip | 34 | 35-36 | 37-38 | 39-40 | 41.5-43 | 44-46 | 47-49 | 50-52 | 54-56 | 35 | 36 | 37 | 38 | 39 | 40 | 41.5 | 43 | 45.5 | 48 | 50 | 52 | 54 | 56 |
| Inseam | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 |
Sizing Notes
Measurements are stated in inches unless otherwise indicated. Size chart values represent body measurements, not garment measurements. Some women's pants are available in petite and tall sizes. Typically petite sizes fit women 4'11" to 5'3". Regular sizes fit women 5'4" to 5'8". Tall sizes fit women 5'9" to 5'11".
PETITE: Generally, as compared to regular sizes, petite sizes are 2.5 inches shorter in inseam, 1 inch shorter in body length, 1.25 inches shorter in sleeve length and Âľ inch shorter in total rise.
TALL: tall sizes are 3 inches longer in inseam, 2 inches longer in body length, 2.5 inches longer in sleeve length and 1.25 inches longer in total rise.
Capri or cropped pants have an intentionally shorter inseam—reference the technical specs instead of this chart.
Inseam is measured to the floor.
Better gear is built together
From feedback to field testing, all of our gear is dialed-in by REI Co-op members. Their adventures informed every stitch and detail—making for better, longer-lasting gear.


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Great for Active Cooler Mornings
I was hoping to use these pants for early morning hikes. The fleece lining kept my kept my legs comfortably warm while not causing me to over heat or sweat excessively. I wore them in 50 - 70 degree weather; all comfortable. I'm not sure if I'm in between sizes or if the fit just isn't right for my body. The pants fit loose in the waist and crotch, tight in thigh area and loose by my ankles. I'm 5'3, 185 pounds, wearing size XL. With all that being said, they are really comfy and will be worn a lot!
Great Material & Perfect Pocket
I’m anywhere from a sm to a lg in tights. All makers are different, these are “generously” sized. The large is a bit big for my liking so I should have gone medium. I do LOVE the material & the pocket. Wore them for a hike in 37 degrees in Canada, they were perfect!! Just should have gone with med. Pocket at the leg was perfect to keep my phone to pull out for pics. Color is more like a “charcoal black” if that’s a thing. Not dark black. Ill be getting another pair!
Decent quality, not in love with the fit
I received this product for free through the REI trailblazers program in return for my honest review. Overall, I felt that the product was decent quality. Seems like durable fabric, and I felt cozy at 40 degrees. There are plenty of pockets - 2 phone sized ones on each side, and card and key b/l, too. I like the higher waist, too. Not entirely sure the drawstring is necessary though. My main issue was with the fit. I have pretty muscular legs, so bagginess is not usually an issue, but these tights bunched behind my knees and pulled in a weird way across my hips. The bunching wasn’t necessarily a killer, just annoyingly noticeable and mildly uncomfortable to constantly be feeling that when running around. Really minor thing - I dont love a random logo on my knee.
Great Winter Running Tights!
I received these products for free from the REI Trailblazers sampling program in exchange for my honest review. These are excellent tights for cold weather running! Very comfortable and warm! They are true to size and are perfect for cold mornings. I wore them on warmer days, so I know they'll be better for the colder days ahead! The pockets are nice and big, which are a requirement for me. True to size as well.
Great running pant
I received the swiftland thermal running tights last week. I was so excited to try them out that even though I wasn’t going on a run the first day, I just wore them around the house. They are very comfortable. I was concerned about sizing as they looked small, but they have plenty of stretch! I took them running this morning and they feel great. They fit around my legs and give me room to move. I like the pockets a lot as my cell phone fit inside and I didn’t feel weighed down or fear it falling out. The legs are tight enough to give a good compression feeling which I like as I normally wear compression socks when running too. But the hips are not too tight which again I like as I have room to breath! Weather wise it was a nice 65 degrees so I am unable to tell if they will keep me warm when it gets down to the 40s, but I think they will! I would highly recommend to fellow runners looking for a nice running pant. I am a size 6 or 8 and medium was just right for me.
good winter essential
Just tested these out in 40 degree weather, the first is great, nice high waist, good size phone pocket, sizing is more generous than Athleta Rainier tight. Will be using these all winter
Flattering and comfortable
I like these! Have yet to test outside in the cold. I purchased a size medium, normally I wear 26-27” pants or size 2, and these fit just fine. I love the cut and multiple pockets. Going to order a size Small as these are on sale just to compare, but the M fits well. These are full length on me with, and Im 5’9.
Overall comfortable tights
I received these products for free from the REI Trailblazers sampling program in exchange for my honest review. Not sure why REI wanted these reviewed during the SUMMER, but I wore these out walking in the early mornings when the temp was in the 60s. Comfortable fit, thicker material, nice side pockets for my phone. Tights also have two large waistband pockets that fit my iPhone 12 Pro, but I put my house key there (will probably use these pockets for gel packets on longer runs). Wider waistband however did make my hips look more boxy, but I'm pear-shaped to begin with. Drawstring is helpful, but I have been favoring brands that have a sewed, continuous drawstring instead of two ends to tie so I don't have to remember to tie it together before the washing cycle. Looking forward to wearing these on the plane next week when I tend to freeze in a/c. Should be perfect for long runs in the winter.
big fan, huge!
These quite possibly might be my new favorite winter running pants. Haven’t tested them out in the ultra cold temps yet, but they held up in 40s and windy on their inaugural jaunt. Love these! They feel like buttttttaaahh.
Not Warm enough for me
I didn’t find the warm enough - maybe for runners they are, but I was more interested in them for cycling - I didn’t even find them warm enough for walking in ~40 to 50 degrees

