About the author

Tim Moss

Tim Moss has supported over 100 expeditions across all seven continents. He has climbed new mountains, crossed a desert on foot and recently cycled 13,000 miles around the world. He is a Fellow of the Royal Geographical Society London and a Guinness World Record Holder. He aims to encourage more people to live adventurously. Read more...


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  6. 6


    Great article, thanks for the information. Very interested in bamboo as an alternative to merino.

    1. 6.1

      Tim Moss

      Thanks Tim. I’m a big fan of bamboo although most companies seem to have stopped making it and the BAM range is very slow to dry unfortunately.

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  10. 7


    My partner is really happy with a Regatta Bamboo tshirt he bought this year, performance and odour control, but not old enough to judge durability. Funny I couldnt find it on the regatta webpage, but there are on amazon.uk!! My latest Icebreaker cycling merino tshirt has four holes after two months… not happy at all.

    1. 7.1

      Tim Moss

      Thanks for that Bego and great to hear that there’s still some bamboo out there, even if you have to trawl amazon for it.

      Sorry to hear about your merino t-shirt though. Mine lasted a year before the hole’s started appearing but it’s never going to be as tough as the alternatives unfortunately.

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  12. 8


    Afternoon Tim,

    I’m taking the family (wife, 7 & 5 year old boys) to Lapland in December of this year & don’t know which type of base layer to go for to ensure we keep warm. The most strenuous activity I can see us doing is sledging but I can imagine there’ll be a lot of sitting still (sledging behind huskey, reindeer, skidoo’s etc.).

    I need some advice on which material to go for.

    1. 8.1

      Tim Moss

      Hey Scott, sounds great. I’m jealous! I wouldn’t worry about performance/wicking since it’s not high intensity so forget synthetics – they can feel cold and get smelly anyway.

      Both bamboo and merino would do you well. Bamboo feels nicer (in my opinion) and is perhaps a little cheaper. BAM would be good. If you want really warm – and are feeling flush – then try Swedish merino brand: Woolpower.

      That said, I reckon you’d be absolutely fine with cotton skiing thermals. Stuff you can probably get from department stores as well as in the end of season ski sales. They’ll be warm, cheap and tough, and you shouldn’t be sweating for long enough for them to cause a problem.

      Hope that helps?


  13. 9


    Hi Tim,

    That’s a really useful breakdown – thanks.

    I run hot all the time, so my problem is that I overheat easily and then sweat a lot. My main issue is being hot and bothered while hiking – when I stop my clothes might get cold because they’re wet, but that doesn’t really bother me as I’m warm blooded enough for it rarely to be a problem (and in fact it’s often quite nice).

    With that in mind, and given what you’ve written, is there anything better than a loose fitting cotton shirt or t-shirt for me when hiking in warm or hot places? My only issue with cotton is the heavy, wet and clingy feeling can be rather unpleasant sometimes.

    Everybody recommends merino wool to me – but it sounds to me like I’ll just feel even hotter!


    1. 9.1

      Tim Moss

      Hi Mike, thanks for the comment. An interesting question.

      For warm weather, I would definitely not recommend merino. As you guessed, it will probably be hotter and certainly won’t get rid of that wet, clingy feeling.

      A light bamboo t-shirt might be a slight improvement – they can be a bit less sticky – but I reckon you’re best bet would be a nylon trekking shirt. You get them in outdoors shops, they’re always khaki coloured and often made by Craghoppers or Columbia (like this one).

      Avoid a really cheap knock-off one as bad nylon is really bad but any main-brand one – or one you can try on yourself – should be good for you. They’re really thin and hang quite loose (even when close cut) so stay dry and wick really well. Of course, wicking well in warm weather means you’ll loose more water than staying in that damp, clingy cotton shirt but it should be a lot more comfortable.

      Does that help?

      1. 9.1.1


        That’s great -thanks.

        So is this basically right –


        Pros – Coolest, look normal, not smelly, retain water

        Cons – Clingy, chafing, get cold if the weather turns


        Pros – Comfortable, dries well, looks pretty normal, pretty cool

        Cons – Smelly, not quite as cool, lose more water

        So like anything in life, it’s a compromise.

        Many thanks.

      2. Tim Moss

        You’ve pretty much got it Mike. Just be aware that “nylon” is a big field. It includes Helly Hansen style synthetic baselayers which are superb wickers; cheap, nasty sports tops that, although they don’t hold much water, hardly breathe at all; and the trekking shirts which wick OK but mostly work well because you wear them on their own and they are so thin and loose that a breeze takes away any moisture.

        You are right that it’s a compromise though. That’s why I don’t go in for any “Best Base Layer” stuff. They’re all just good for different things.

        Good luck with it!

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  15. 10


    I cycled around the world this past year and brought along a range of synthetic and Merino wool shirts. However, in the end, nothing worked better than a 3-pack of white cotton shirts I bought at a thrift shop for $5.

    1. 10.1

      Tim Moss

      Sounds about right Terry. Cotton shirts were what I used on my own round-the-world cycle.

  16. 11


    Hi there

    I’ve got a 7k rowing race very soon and need to wear a skin under my club vest.

    No idea what the weather will be like but I need something breathable, easy to move in, comfortable, and warm. Though after the first 5 mins I will have certainly warmed-up so I need something that won’t allow me to overheat!

    I will probably get quite wet throughout the race but I will change soon as I get off the water, so a quick drying time is not essential,

    Any suggestions? Thank you,

    1. 11.1

      Tim Moss

      That’s an easy one Natasha: Helly Hansen.

      They’re really popular amongst rowers (I’ve never discussed it with them but you see those blue/black-and-white stripes on rivers all the time).

      You could use any synthetic base layer made by an outdoor brand (e.g. Berghaus, Mountain Equipment, Lowe Alpine) but Helly Hansens are a good example. A synthetic top will perform better than any other material (i.e. wick away sweat/water fastest) and dry fastest (meaning it’ll keep you warmer).

      Best of luck with the race. If you do buy a baselayer online, please do consider using one of the links above – it means I’ll get a small percentage.



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  20. 12

    Aaron Kawalek

    Good Day Tim. This is a terrific article, especially the portions that discuss Merino Wool BaseLayer. I am the Sales Manager for a start up Merino Wool company under the branded name of WoolPro. I would like to tell you more about us, etc. How do I go about doing so? I can be reached at; [email protected] or (888) 717-5492. Ask for Aaron. Thank you Tim.

    1. 12.1

      Tim Moss

      Hi Aaron, thanks for the message. You can email me on [email protected] or through http://www.thenextchallenge.org/contact

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  24. 13


    Hello Tim,
    I’ve found this blog by searching for base layers. I’ve been reading about them for a few days now, and this is by far the best article I have found on the internet about the subject. But I’d like to ask a couple of things if I can.

    -The article starts by saying that synthetics have the best wicking qualities, but then the “sport” variety of the synthetic is described as having bad breathability. If these things are synthetic but their cheap quality makes them bad at wicking, I wonder what they are good for, since I was looking at them for working out at the gym.

    Also: what do you think would be the best kind of layer for everyday life? I’m about to move to London and I’m very sensitive to cold. I was looking for something to wear anywhere- to work, to run errands, etc- under my main top. Probably merino? Have you ever worn a base layer for your everyday life too?
    Thank you dearly

    1. 13.1

      Tim Moss

      Hey Mark,

      Good questions.

      All the synthetics hold very little water. So an expensive outdoor top and a cheap football top will come out of a washing machine feeling almost dry.

      However, cheap sports tops aren’t very breahthable. In other words, they feel really sticky when you get hot in them. Consider it a bit like a plastic bin bag. That wouldn’t hold any water and would dry off really quickly but if you wore it out running you’d get covered in sweat because water can’t pass through it.

      They’re good for being really cheap and not getting wet. If you’re outside in a breeze and/or for a short period then they’re OK becaues you don’t get too sweaty. For the gym, I’d usually just wear a cotton t-shirt. They’re cheap, comfortable and don’t smell. And if they get sweaty then you’re in a mild, air conditioned environment it’ll help keep you cool and you’re unlikely to freeze. If you’re really anti the sweat then just get a proper synthetic running top.

      Cotton’s popular for a reason. It’s cheap, comfy and warm. That, of course, is what most people wear.

      If you’re particularly active and/or get cool from sweat then I’d suggest bamboo. It’ll be just as good as merino for most activities but is much tougher and usually cheaper. Merino’s good but usually doesn’t last long and some people find it itchy.

      Hope that helps.


      1. 13.1.1


        Thank you Mark, this helped a lot!

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  26. 14


    Hello Tim, great to read your enthousme for bamboo. I’m working on an online store that is 100% focused on bamboo basel ayers and underwear. I have contact with a designer who also has production management with 95% bamboo. Am now working on the business model, because I am located in Netherlands and need a larger market. There are big brands with big marketing budgets and the stock is capital intensive if you want to deliver quickly (and of course you want for your customers). Would you like to ask some questions. For example, which of bamboo products seem most logical to first offer (sports boxer, base layer short sleeve, base layer long sleeve, pants longsleeve) and one color (black?) Or also another (gray, blue, or ….). And for what audience? Outdoor, Running, Walking, Fitness, underwear for team sports, Cycling. And what price you think is fair to ask?

    1. 14.1

      Tim Moss

      Hey Sjoerd,

      Thanks for the messsage. Cool that you’re thinking about starting an online store. I think bamboo clothes are popular at the moment and there perhaps aren’t that many good sites to get stuff from.

      To me, there’s a distinction between outdoors kit that uses bamboo and normal clothes that use bamboo. It might be worth focusing on one or the other rather than trying to straddle both and perhaps confuse people.

      I don’t know anything about strategy in the bamboo clothing industry but if it was me, I’d focus on long sleeve black tops.

      As for pricing, I don’t think I’d judge on what was fair but rather how much it cost me to make/distribute, how much the competition was charging and where I wanted to position it (e.g. budget or premium).

      Best of luck with it and please do come back to let us know how you get on.

      All the best,

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  28. 15


    HH link is broken

    1. 15.1

      Tim Moss

      Thanks for the heads up. Retailers are forever changing their URLs! Duly updated.

  29. 16

    James Regan

    For performance outdoor base layer in bamboo check out OMM. Their Grid top is bamboo polyester blend and has become my favourite trail running top, beating icebreaker merino and tons of synthetics

    1. 16.1

      Tim Moss

      Thanks for the tip James. I will try to get my hands on one. In general, I think the blended materials seem to produce much better results (and give me more things to write about)!

  30. 17


    Hey Tim, nice content and thanks for the redirect to Bam Bamboo clothing.

    As a cyclist for 10 + years, I’ve always used synthetic clothing but my skin gradually got worse and worse. I had no idea why until a dermatologist told me I had acne mechanica from synthetic fibres and to use cotton or silk. Not easy fitting a tight baselayer under cycling lycra. So far I’m really happy with BAM but am waiting in suspense to see their summer baselayer line. Would love to get an update if you know of any other “as close to natural” base layers that can be used for cycling.

    Thanks again.

    1. 17.1

      Tim Moss

      Thanks Alison. That’s really interesting.

      I think bamboo/merino blends are great. Tougher than merino (which is expensive and fragile) but better performance than bamboo/cotton (which is really slow to dry).

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  34. 18


    Great information, thanks fo this good idea

  35. 19


    I agree with you Bamboo clothing is the next best thing after cotton. I own a couple of bamboo undershirts that I used to wear while playing footy or jogging. You should give Bamigo a try – https://bamigo.com/us/bamboo-t-shirts


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