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Shop nowWorked well in the mountains of Kyrgyzstan
"Kept me warm and comfortable on the freezing nights of my trip, definitely recommend trying on if you can in store as I thought my size would be different. Good product"
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$120.00
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$120.00
This item's price has been updated recently to ensure you get the best value.
Last priced at -
Our best-selling base layer bottoms made from soft and breathable 100% merino wool jersey, the 200 Oasis Leggings With Fly are the perfect foundation for your cold-weather layering.
Good for:


100% Merino Wool, Exclusive of decoration
Machine wash cold gentle cycle. Wash with like colors. Do not use softeners. Do not bleach. Do not tumble dry. Line dry in shade. Cool iron. Do not iron print. Do not iron decoration. Do not dry clean.
Model measurements
Height: 6'3" / 191cm. Waist: 33.1" / 84cm. He is wearing size Medium.
Key product measurements
Inseam Length: 78.1cm based on size L
Fit
Slim
Overall rating: 4.7438426 / 5 from 203 reviews.
The Men's Merino 200 Oasis Thermal Leggings wFly are highly regarded for their excellent fit, soft and odor-resistant fabric, and suitability as a base layer for cold-weather activities. Customers appreciate the perfect weight for winter conditions and the high-quality feel of the leggings.
Review topics: ["size","fit","weight","works","fabric","material","quality","pants","feel","comfort","wear","base layer","layer","weather","top","leggings","moisture","winter","heat","wool","protection","stretch","warmth","johns","buy","pair","john","icebreaker","underwear","clothing"].
"Kept me warm and comfortable on the freezing nights of my trip, definitely recommend trying on if you can in store as I thought my size would be different. Good product"
— Kooper (5/5)
"It has a great fit and provides just enough warmth for lounging around camp in the evening. It’s also a great layer for an early morning hike under a pair of shorts."
— Anonymous (5/5)
"I like these wool thermals a lot. They aren’t super bulky so they fit nicely under my pants but they are still nice and warm. They fit true to size and they don’t ride up or anything like that. These are good for milder temperatures if you’ll be standing around or colder temperatures if you are going to be active. I think I’m gonna try out the thicker/warmer ones for ice fishing season next year."
— Anonymous (5/5)
"I got these during a friends and family event for my partner who works as a bike messenger. Cold wet any awful conditions you name it he’s working in it. He LOVES these. They don’t need to be washed all that often so they can go for a while between washes. They’re soft and incredibly warm. Highly recommend!"
— Anonymous (5/5)
"I run the 200 as my primary cold weather base layer on a daily basis for LE winter patrol. I due wear through 2 or 3 pairs per winter and they eventually rip. I am very hard on the product and I like them so much I’ll just replace a pair if I rip them."
— Anonymous (4/5)
"Great leggings! They are warm and regulate heat well. I run hot and these wick moisture as a wool base layer should. I’ve run them through the wash a handful of times (and even through the dryer once on accident) and they’ve held up fine with minimal shrinking."
— Anonymous (5/5)
"These are solid leggings quite warm in freezing temps. They are fragile as expected with merino but seem well made. The waistband is thin which is somewhat uncomfortable. I am a medium per the sizing chart but the large fits me much better. I am usually between a medium / large most items. 5'9 172lbs 32 waist"
— Anonymous (5/5)
"The oasis 200s are kind of legendary now and the reasons are how comfortable and lightweight they are. They’re not the warmest but I’m not using them for long periods outdoors so they’re perfect for me because they don’t get too warm either while I’m indoors."
— Anonymous (5/5)
"The 200s are a perfect feel for winter outings."
— Anonymous (5/5)
"I bought a few pairs in prep for an extended trip to the arctic circle based on a recommendation. The large fits great (I’m 5’10 and 195lbs) and has god stretch so they feel comfortable when active. I used them in low 30F for a few days and the leggings handled going from borderline sweaty to drying off when less active. Worth the price!"
— Anonymous (5/5)
Find the size that fits you best based on people just like you.
Use the chart below to determine your size. If you’re between two sizes, order the smaller size for a tighter fit or the larger size for a looser fit. If your measurements for chest and waist correspond to two different sizes, order the size indicated by your chest measurement for tops and your hip measurement for pants.
| XS | S | M | L | XL | 2XL | 3XL | |
|---|---|---|---|---|---|---|---|
| Waist | 27.5-29.5 | 29.5-31.5 | 31.5-34 | 34-37 | 37-40 | 40-43.5 | 43.5-46.5 |
| Hip | 34.5-35.5 | 35.5-36.5 | 36.5-39 | 39-41.5 | 41.5-44 | 44-46.5 | 46.5-49 |
| XS | S | M | L | XL | 2XL | 3XL | |
|---|---|---|---|---|---|---|---|
| Waist | 70-75 | 75-80 | 80-86 | 86-94 | 94-102 | 102-110 | 110-118 |
| Hip | 83-88 | 88-93 | 93-99 | 99-105.5 | 105.5-112 | 112-118.5 | 118.5-125 |
*Looking for the inseam length? Please refer to the product page to find out.
Our three different fits - slim, regular, and relaxed - ensure that when worn together, layers move and breathe like a single garment.
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