Katmai Men's Expedition Wool Bottom

$119.99 - $139.99

Color:  Black

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Product Description

Product Story

Easy Care

Size Chart

Additional Information




X-Small, Small, Medium, Large, X-Large, XX-Large, XXX-Large, Medium Tall, Large Tall, X-Large Tall, XX-Large Tall,

18 review(s) for "Katmai Men's Expedition Wool Bottom"

  1. 5 out of 5

    shane - :

    HOT! perfect for extreme cold and you want to keep the layers down, -10 to 20 and a flannel shirt or light wind breaker will be all you need, maybe great for antarctic travel. This weight would be great for a hunting stand when its 0 outside and your not moving. probably great if you are naturally cold blooded or have low blood circulation and dispise cold weather. This is the best product I have every used for actually not letting any body heat out. consider light weigh if your going to be active.

  2. 5 out of 5

    Z37 - :

    Very Warm, soft, fit true to size, working great here in michigan, past few days have been 5-15 degrees. I have to say I am surprised that these don't itch as much as I thought they would, this is my first pair of wool undergarment/long johns. Initially out of the box I thought they were a bit bulky, but they sit right on your skin, you don't have to worry about them bunching up they fit under my jeans, hiking pants, dress pants(sometimes). Some people may think the heavyweights are too much for day to day use, but I love them. I love lounging around the house in just these, they are warm enough where you don't need pants. I recommend getting the hiking expedition socks aswell, great product that has good compression and my toes are warm. Pros: Warm, soft, doesn't itch, quality merino, "resting warmth" Cons: washing? haven't washed mine yet, and some people may complain of these being too warm, not me :) I did purchase this from amazon, however, it was my first minus33 purchase and I would recommend this to all friends and family, over any other brand: smartwool/icebreaker/woolx/omniwool/etc Adirondack 2/46

  3. 5 out of 5

    Mike - :

    Hi, I would give all of Minus33 Big and Tall gear a 10 out of 5! Off the charts. I'm 6'-4", and it's awesome to have baselayer shirts and longs that are actually a bit long for me, I love it. I'm a power lineman so, the fire resistance properties of the 100% wool is a huge plus. Also, I bicycle commute, all you need is a wind breaker and these for -30 degrees. I've had my merino for 4 years now, wash, hang dry, no fabric softener, good to go. Only weak point is from abrasion, wear and tear. Not a big deal to me, I'll get more, it's that good.

  4. 5 out of 5

    Nick - :

    First let me start off by saying my order arrived right away. I placed my order on Monday and it arrived on Wed. when I selected the slowest shipping speed. That's awesome! Now on to the actual product. It's great. At first it might seem like a lot to spend but you can certainly tell it's a quality product. It makes sense when you hold it. It's a dense. There is a fair amount of wool to this garment. The expedition weight is some serious warmth. I use these under my drysuit when I whitewater kayak in early spring or late fall. It works great and super comfy. I also on rare occasions use them when cross country skiing. But that's only when it's super cold. Overall, I would suggest their midweight level for your go to base layer for winter activities. If you're doing something without a lot of movement or want serious warmth. Go with this. You won't be disappointed.

  5. 5 out of 5

    Timothy - :

    My Katmai Men's Expedition Wool Bottoms are fantastic. Great fit and the 400g/m2 thickness of the 100% marino wool keeps me warm and dry when working in cold and wet backcountry conditions. Greatest warm baselayer ever! Please consider adding a version of this bottom without the fly to wear on the outside for cold weather biking or running.

  6. 5 out of 5

    D Nielsen - :

    I have tried merino products from most of the common brands, and these are easily the best heavyweight bottoms I have come across. They are simply outstanding. The material is substantial, buttery soft, and very warm. It also washes up nicely. I have worn them for days straight and they remain odor free. I usually machine wash and hang dry them, but I have tumble dried them occasionally, and there has been minimal to no shrinkage or twisting. The construction seems solid, and the fit is true to size. I can't say enough good things about them. Well done Minus33, please don't stop making these!

  7. 5 out of 5

    Jarrett - :

    This product has surpassed my expectations. I'm a year round sea kayak guide in the PNW. This base layer for the cold months have kept me extremely comfortable under my dry suit. For multi day expeditions the security of wool and the odor resisting properties is an easy decision.

  8. 5 out of 5

    Martin Bril - :

    I used to wear cotton bottoms...until I found these a few years ago. If you own the Yukon Expedition top, those are the long johns you are looking for! Very hot, perfect for those cold winter days braving the elements. I also wear them as a single layer when pants are not mandatory! Amazingly tough, they will remain part of my winter gear for many years to come.

  9. 5 out of 5

    Timothy - :

    I love the weight and warmth of these they are perfect for layering in cold weather. Problem is that I cannot wear them by themselves for cold weather running and biking because of the fly. Please, please, please make a version in this weight without the fly to use like a sweatpant. I will buy several.

  10. 5 out of 5

    Dave - :

    Fit: I planned on using this product (Expedition) as a first or second layer, so I purchased one size up. They form fit with room as a single base layer (same fit as pictured on the model above), but they also accommodate another thinner base layer underneath with no binding or stretching. For me, the sizing matches what I wear for Levi's relaxed fit jeans. Warmth: I have used them (single layer) under jeans for casual use in both subzero F and single digit F, and they performed as expected, since jeans do not stop wind very well. They remained comfortable while indoors. I just recently coupled these (as a single base layer) with UA Sticks and Stones ski pants in -1F. While mostly standing for a 20 minute test, I did NOT notice any coolness creeping in, like when wearing jeans. Comfort: I have owned merino wool socks, so I expected soft, comfortable, and breathable, and that is what these deliver. I have sensitive skin, and I noticed NO itchiness. While these are the heaviest weight Minus 33 carries, and they are substantial, they do not seem overly thick, in that they do fit easily underneath my existing clothes. These are definitely worth the money.

  11. 5 out of 5

    Brien Sesby - :

    The most amazing fit! Okay that may seem simple but I'm tall and slender so a medium tall is hard to find, and I finally did. As for the product I ware it every day, all day and this base layer is the most comfortable base layer I have ever worn, no smell, and warm. I am totally impressed and will be a life long customer now!

  12. 5 out of 5

    Joe - :

    These are great

  13. 5 out of 5

    Drew Hamilton - :

    The socks and Katmai base layer are perfect for winter fishing in Alaska and wading around Kamtai Park in the fall photographing brown bears.

  14. 5 out of 5

    george jamieson - :

    Two years I got some merino wool tights which developed holes. I wrote, and after your customer service asked for photos and told me about soap to use, I decided that I'd used the wrong soap. You then sent me another pair. Your exceptional honesty is the reason I'm re-ordering from you.

  15. 5 out of 5

    Rowdy Flamm - :

    I usually do not leave reviews but I have been so impressed with these bottoms I felt like I must. Fit is perfect, plenty of stretch, does not itch, and very warm. I have tried several other expensive brands of Merino wool and nothing comes close to these. Perfect in every way. Buy with confidence,

  16. 5 out of 5

    Clay Faust - :

    Halfway through the 2018 hunting season here in Ohio, I concluded it was long past time I upgraded all my base layers. After a lot of research and a few recommendations, I decided to roll the dice on Minus 33 Expedition base layers. I could not be more pleased!!!!!!! Not only do I stay warm up in a stand, but these layers do an excellent job of wicking moisture while on a hard drive or a spot & stalk. I was so happy with the Yukon crew & Katmai bottoms performance that I took them along for my ski trip out to Colorado and once again these two products blew me away! Well done Minus 33 team!

  17. 5 out of 5

    Norman Nolting - :

    I purchased expedition weight Katmai bottoms and Yukon crew top in December 2019 for the January 2020 Missouri deer season. Was not sure I wanted to spend this much however after seeing reviews I thought I would try them. Why did I wait? These were the most comfortable and warm base layers I have ever owned. I also purchased the mid weight balaclava in Mossy Oak Breakup. When it arrived I thought this item can't be that good as it was so thin. Again I was wrong. In 20 degree windy conditions I was very comfortable. These are quality products and worth the price.

  18. 5 out of 5

    Jamie Lukens - :

    These pants are a dream come true to someone 6'5" like me!! Bought the Large (Tall) and they fit PERFECT. Very warm, very comfortable against the skin and high quality. What used to take 3 layers can now be reduced to 2 thanks to this amazing product, cant say enough nice things buy them.

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Product Features

Expedition 100% Merino Wool
Expedition Weight Merino Wool



400 g/m2 Interlock Knit   |   100% 18.5 Micron Merino Wool   |   UPF Rating 50+


On the coldest, darkest nights, you will discover yourself seeking the warmth of Minus33 Merino Wool. Our Expedition products are suitable for the coldest climates and true expeditions.


Originally designed for winter mountaineering on Mount Washington, Minus33 Expedition Weight clothing has seen action in both the Antarctic and Arctic, and even to the Summit of Mount Everest.


Anyone venturing out in the cold will greet our Expedition clothing with a warm welcome as either a base, mid or outer layer. When you need to keep the ever-present cold from seeping in, our Expedition items will be your best friend.


Great for: hikingcampinglifestylesnowsportshuntingice fishing. Temperature Recommendation: High Activity - 0°-, Low Activity - 0° - 30°.


Base Layer
Base Layer

Think of your Base Layer as your second skin. These are your first layers on and your last layers off. These foundation layers should be thermal, moisture-wicking, and breathable. Proper layering of your garments is very important and in extreme cases may save your life. Consider your activities carefully and plan for the unexpected. Learn more about layering.

Mid Layer
Mid Layer

The Mid Layer is your second layer. It should provide insulation, and be breathable. It can also be an outer layer if weather permits. Proper layering of your garments is very important and in extreme cases may save your life. Consider your activities carefully and plan for the unexpected. Learn more about layering.

Regular Fit
Regular Fit

Standard fit with a little bit of room, but not baggy. Works best as a base layer, or when worn alone. Can also be worn as a mid or insulating layer. If you are looking for a tighter, athletic fit, try going to the next size down. Learn About Fit & Sizing.

Flat Lock Seams
Flat Lock Seams

Flat lock seams allow for ultimate comfort, preventing chafing and allowing your clothes to move with you. Flat lock seams are stronger, helping your garments last.

Fly Opening

This product DOES have a fly opening.

Total Easy Care
Total Easy Care TEC

Total Easy Care (TEC) Merino apparel is designed for today’s busy lifestyle. Total Easy Care Merino garments are all machine-washable, and are suitable for tumble drying. Even after frequent laundering they retain an ‘as new’ appearance. They won’t shrink, lose their shape, fade or color-bleed. They remain soft and comfortable for the life of the garment. TEC is a textile innovation used by Minus33 that was developed by the Woolmark Company.

Moisture Wicking
Moisture Wicking

Minus33 Merino Wool regulates the amount of moisture on your skin by absorbing any moisture or sweat on your body. Then, the absorbed moisture evaporates out of the fabric into the atmosphere. Wool is a classic natural insulator, but is just as effective in warmer weather due to its rapid moisture wicking ability. Learn more about wool properties.

Anti-Microbial and Odor Resistant
Anti Microbial and Odor Resistant

With less moisture comes less odor. Minus33 Merino Wool resists against microbes and odor, so foot fungus and smelly odor will NOT be a problem while wearing our products. Merino Wool fibers naturally reject any bacteria in moisture or sweat as it is wicked away. This means you don’t have to wash wool as often. Less laundry means less water being used, benefiting our planet. Learn more about wool properties.

Insulates When Wet
Insulates When Wet

Wool will absorb up to 30% of its weight in moisture without feeling wet or clammy. If you do get wet, whether it be from sweat, weather, or water bodies, wool will insulate you better than cotton or polyester materials. This is especially important if you are in a survival situation, and can help prevent or delay hypothermia depending on the conditions. Learn more about wool properties.

Fire Resistant
Fire Resistant

Merino Wool insulates against high temperatures and does not readily catch fire. If it does, it self-extinguishes. When Merino burns, it doesn’t melt and stick to the skin like synthetic fabrics do. For this reason, merino is popular among military, firefighting, and law enforcement communities. Learn more about wool properties.

UV Protection
UV Protection

Don’t worry about sunburn on a sunny day summiting a peak. Lightweight layers have a UPF rating of 25. Midweight and Expedition have a UPF rating of 50+. Learn more about wool properties.

Full Length Bottom
Full Length Bottoms

Full length bottoms with standard inseams.