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About Kenyon Polartec® Power Stretch® Base Layer Bottoms - Heavyweight (For Men)

2ndss. Gearing up for some cold-weather adventure? Start with Kenyon's heavyweight base layer bottoms, made with Polartec® Power Stretch® for top-notch warmth, breathability, wicking performance and range of motion.

Specs about Kenyon Polartec® Power Stretch® Base Layer Bottoms - Heavyweight (For Men)

  • Base layer weight: Heavyweight
  • Fabric: at least 42% polyester the remainder nylon and spandex
  • Care: Machine wash/dry
  • Weight: 6 oz.
  • Made in United States of America
  • Visit our Layering Guide

Do you own this product? Write a review and help others with their buying decisions!

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4.366336 5 Overall Rating: 4.4 Based on 202 reviews

Most Helpful 5-Star Review

Verified Buyer Reviewed by kairmid from Boston, Ma on Sunday, October 30, 2011
Nice snug fit, super soft inside. And not just for men - I'm female, 5'10", generally wear a size 16 and the large fits perfectly. They don't sag, like my last pair (Lowe Alpine). Great on their own with a long tunic top, great as a base layer. And they're made in the USA, I'm trying to buy as mu... Read More
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  • Verified Buyer Reviewed by Ocean Breeze from SF Bay Area on Wednesday, May 25, 2016
    The polar stretch long undies are perfect for cold temps on backpacking trips. They are soft, warm and durable.
  • Verified Buyer Reviewed by Vickie from Mechanicsville, Va on Monday, May 2, 2016
    True to description, very soft
  • Verified Buyer Reviewed by Blackout from TN on Friday, April 8, 2016
    I use these to sleep on cold nights in a hammock. 32 degrees and below. They are very warm and comfortable with plenty of length. I'm 6'2" with long legs. Fit is correct to sizing guide. I bought a 2nd pair. I think they would be too warm to hike in for me unless it was close to zero or below. These would be great for hunting!
  • Verified Buyer Reviewed by Monika from Wisconsin on Thursday, April 7, 2016
    I ordered this 2nd pair for next year because I loved the first pair so much. I got these at a great sale price and will be looking forward to wearing them in the colder weather next winter. Thank you!
  • Verified Buyer Reviewed by Simon from Portland on Thursday, March 10, 2016
    I bought the heavyweight, but sent me a midweight.

Questions about this product? Get answers from community and staff experts.

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  • Question “is there a fly in these?”

    Asked on 12/4/2015 8:05:35 AM by GS from Gilas
    • Answer No.
      Answered on 12/4/2015 8:45:00 AM by Regina Falangee from Cheyenne, WY
    • Answer No fly.
      Answered on 12/4/2015 9:12:50 AM by Sierra Mountain Hiker from Northern California
    • Answer Unfortunately, they do not have fly.
      Answered on 12/4/2015 1:29:09 PM by Kostyantyn from Delaware
    • Answer These do not have a fly.
      Answered on 12/7/2015 11:16:05 AM by Product Specialist Greg from Sierra Trading Post
  • Question “Are these products seconds and if so what kind of things are wrong with them?”

    Asked on 11/14/2015 4:26:05 PM by faithmet from OK
    • Answer Nothing wrong with these. Not seconds. I have used them quite a bit already, washed them several times, and worn them hiking and to work (I work out in the cold). I would be happy with them at full price, but the STP deals are really good. The only thing is the tags in the back are itchy and annoying, but easy to cut out!
      Answered on 11/14/2015 6:21:37 PM by Sierra Mountain Hiker from Sierra Mountains, California
    • Answer What are these made of: "Fabric: 48% polyester, 34% nylon, 18% spandex or, 61% polyester, 25% nylon, 14% spandex"

      As for the rest, I own both merino wool base layers + fleece base layers. I like them both for various reasons.

      - FLEECE: When I'm on backcountry expeditions, the fleece wins. Extremely lightweight, breathable, dries quickly and very warm depending on the quality/ thickness/ composition.

      - MERINO WOOL: Hands down the cosiest, best feeling on my skin, very warm, and wears like iron. Tends to be slightly heavier weight-wise, however. I'll use it for skiing, day hikes, and just keeping warm at home.

      I don't work outdoors for a living, but if I were, I might try two base layers... maybe a technical polyester lightweight fleece on the inside, then merino wool as a mid-layer. In fact I often use this combination anyway. Best of both worlds: max breathability of the polyester base, and excellent arming of the merino mid.
      Answered on 7/23/2015 7:07:52 PM by Davey Crockett from Tennessee
    • Answer I like these. They are light and the inside is a short fleece so has good connection with skin. The outer layer is smooth/slippery so doesn't bind on clothing. These are a little thicker than duofold. They will dry quickly. They are made of 54% polyester, 31% nylon, and 15% spandex. I suggest ordering a size or two larger. There is no opening in the front which may be a consideration for men to think about. Are they better than merion wool for warmth? I think so but others may disagree.
      Answered on 7/24/2015 8:00:28 AM by Kayte from PA
    • Answer 48% Polyester, 34% Nylon, 18% Spandex. Just returned from fishing in Alaska and wore these inside my breathable waders and they performed exactly as I needed. For extreme cold I recommend these as a base followed with a middle layer and a wind/weather proof top layer. Merino wool is a great product but for the price and performance it would be hard to beat this product.
      Answered on 7/30/2015 11:49:08 AM by Let's Get Mikey from Utah
  • Question “What is the inseam for a size small? What is the inseam for a size medium?”

    Asked on 1/26/2015 12:11:59 PM by Andrew from Virginia
    • Answer Not sure on the measurements but my bf says the insteam seemed short he felt pretty bunched up down there. Hope this helps.
      Answered on 1/26/2015 12:25:50 PM by Jackie from New Jersey
    • Answer 33 for size M
      Answered on 1/26/2015 12:45:59 PM by Andrey from OR
  • Question “My husband works outside in the very cold will these keep him warm? ”

    Asked on 9/23/2014 6:56:56 AM by Linda from Pa
    • Answer I use for both work and skiing. They work very well.
      Answered on 9/23/2014 7:01:28 AM by Nemesis67 from Detroit
  • Question “My husband works outside in the very cold will these keep him warm? ”

    Asked on 9/23/2014 6:56:01 AM by Linda from Pa
    • Answer Yes, these base layers are different than any I've ever seen! When I got them out of the box, I thought these are not what I was looking for & my husband said the same thing. They looked like sweat pants, very thick & looked baggy not tight fitting. I said, "well try them on any way!" He couldn't believe how wonderful they were. They are tight fitting, so warm & so comfortable! He looks forward to wearing them when the cold gets here! I highly recommend these to keep you warm & very comfortable.
      Answered on 9/23/2014 7:12:05 AM by Amie from KY
  • Question “Does the fabric pill on these? Thanks!!”

    Asked on 12/29/2013 9:55:07 AM by KFingC from RVParkUSA
    • Answer Has not to date on the 3 pairs that we use! Brendan reports that these are the best long underwear ever.
      Answered on 12/29/2013 11:08:24 AM by Molly from Avon, CO
    • Answer I have not taken them out of the package, because they appear to be so thick that I'm sure they will be too warm. I had a different impression of how thick they were from the photos. But the price was so appealing that I can't even justify sending them back. Maybe I will pass them on to a family member who skis. Generally speaking, based upon past experience with clothes, cotton/poly blends are the worst at "pilling" as you call it. 100% polyester does not pill at all. These are nylon/poly, which I predict will not pill at all. They do not have a fly, so they are unisex garments. Other similar base-layers have flys.
      Answered on 12/29/2013 12:51:27 PM by landscape painter from california
    • Answer Not so far and if they did I don't know anyone who would not wear pants over them.
      Answered on 12/29/2013 2:09:52 PM by Frap from Chicago
    • Answer I wear these all the time and have seen no pilling.
      Answered on 1/1/2014 3:14:49 PM by Active older woman from Upper Michigan.
  • Question “Would these work for a guy with a 34 inseam?”

    Asked on 12/12/2013 8:07:43 PM by Rick from NY
    • Answer being a woman, I really cannot say, but these are very thick - which might be good if you are in snow country.
      Answered on 12/12/2013 8:59:34 PM by landscape painter from California
    • Answer I just tried these on and I wear a 32 inseam. There was some bunching of material around the ankles, so they will work for someone with a 34 inseam. I'm very impressed with them as they keep my legs very warm.
      Answered on 12/13/2013 9:09:58 AM by Dalegend27 from Pittsburgh, PA
  • Question “Would these be good for doing Yoga at home?”

    Asked on 11/15/2013 11:12:44 PM by Tony from Vancouver
    • Answer You could wear these for doing Yoga at home if you wish to. They should be comfortable enough.
      Answered on 11/18/2013 3:18:59 PM by Product Specialist Greg from Sierra Trading Post