100% Merino LS Baselayer

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When the riding weather turns decidedly chilly, it’s time to break out the 100% Merino Long Sleeve Baselayer. Slightly thicker than the SS and SL versions, this is a base that can be paired with one of our Long Sleeve Jerseys to keep you warm well into the worst of winter.

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85,00 USD
Laurel Wreath
  • Free standard EU shipping on any order over 150 EUR
  • Express EU delivery 1-2 business days
100% Merino LS Baselayer Laurel Wreath
100% Merino LS Baselayer Laurel Wreath 85,00 USD

Natural Merino fibers to keep you naturally warm

Product description

The comfort level of your ride is often in direct proportion to the effectiveness of your baselayer. With a Long Sleeve 100% Merino Baselayer, you will have the best natural material right next to your skin, wicking moisture away from your body to help keep off the winter chill. Merino ensures the perfect level over insulation for cold rides. And you won’t have to worry about introducing your smelly presence into a coffee shop since the Merino offers an odor resistance to help you from alienating your neighbors at the next table.

  • Constructed from 250 g/m 100% Merino wool 
  • Soft to the touch
  • Excellent moisture wicking properties 
  • Easy to care for with cold water washing
  • Designed by Martin Velits using his experience from the pro peloton
  • Made in the E.U.
  • 100% Merino wool

Size Guide


A - BACK LENGTH 66 – 68 68 – 70 70 – 72 72 – 74 74 – 76 76+
B - CHEST 84 84 – 88 88 – 94 94 – 100 100 – 106 106 – 114


A - BACK LENGTH 26 – 26,8 26,8 – 27,6 27,6 – 28,3 28,3 – 29,1 29,1 – 29,9 29,9+
B - CHEST 33 33 – 34,75 34,75 – 37 37 – 39,5 39,5 – 41,75 41,75 – 45

All our baselayers act like a second skin. Extremly slim fit cut with extended back side for lower back protection. Whatever Isadore jersey size you are used to wear, this baselayer will certainly fit you in the same size. However if you prefer more casual fit, we advice you to choose one size bigger than the Isadore jersey you are used to.

Sizing guide

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Use our Size Calculator feature.


5 / 5
45 reviews


    Tomi, 12.12.2020

    I am 182 and 74kg, ordered M (I have everything in M from Isadore) and it comes Race fit. (if you want more relaxed, then go one size up). I use it for Hiking and Winter climbing as well. This is such a quality product from Merino, the best I have ever seen or used (I have a lot of them). Soft on touch and really warm and thick. The price is a steal, go for it!
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  • Au chaud tout le temps !

    Matthieu Bardou, France, 9.2.2018

    J'utilise ces baselayers pour courir ou pour les sorties à velo et j'en suis vraiment content. Ils sont parfaitement coupés et leur technicité en fait un allié précieux pour rester au chaud et au sec. Je les recommande fortement +++
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  • True Merino experience

    Luca, Germany, 14.7.2017

    Quality Merino under vest, feels soft and dry all the time. Great fit and outstanding design, i actually ended up using it in colder days also while working.
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  • size it one up :)

    Florian Fellner, Germany, 14.3.2021 (100% Merino LS Baselayer Grey)

    get one size bigger then your usual isadore product. its quiet short on the arms (im not a long arm guy, really just regualr). im 179cm and around 77kg. i usual have Medium (the regular tshirt baselayer fits perfect on me) but the long one was just to tight in armpits and to short on the arms. the merino wool feels awesome.
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  • Superb

    Grant Reaburn, New Zealand, 3.8.2020 (100% Merino LS Baselayer Black)

    I have a drawer full of merino thermals I wear both off and on the bike. Most are 150 or 180gram weight. This one is 250gram and is the best by far. The sizing is tight to begin with but merino does loosen up with time. Some have commented that these are expensive. I disagree. If you can find a 250gram merino top at a better price I would be surprised and of this quality definitely not. Chapeau Isadore!
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