Merino Long Sleeve Baselayer 150g
Universal long sleeve baselayer with a high content of the finest merino wool with added elastane.
Merino wool is exceptionally soft to the touch, has natural thermoregulating properties, and thanks to its unique features it keeps you warm even after sweating. The long sleeve design makes it an ideal first layer for cooler conditions, offering extra coverage and comfort throughout the season. Elastane increases the material’s shape retention and its ability to adapt closely to the human body. Treated with TEC (Total Easy Care) treatment, the fabric is suitable for frequent washing without losing its original shape or wrinkling. Finished with an improved type of flat seam to enhance the second-skin feel.
4 way stretch
Moisture wicking
Breathable
Thermal regulation
Antibacterial
Quick drying
Flat seams
Merino wool
Temperature 8°C to 16°C
Weight 4/6
Breathability 5/6
Wind protection 2/6
Specification
- Made of 150 g/m² merino wool
- Long sleeves for added coverage
- Soft to the touch
- Made in the EU
Features
- Raglan sleeve
- Flat seams
- The highest level of softness with a fiber thickness of 16.5 microns
- Extra warmth and comfort thanks to long sleeve cut
Materials
- 95% Merino Wool
- 5% Elastane
Merino wool
Size Guide
Fit Guide
| MEASUREMENT | XXS | XS | S | M | L | XL | XXL | 3XL |
| A – Chest | < 85 | 85-91 | 91-97 | 97-103 | 103-109 | 109-115 | 115-121 | 121-127 |
| B – Waist | < 73 | 73-79 | 79-85 | 85-91 | 91-97 | 97-103 | 103-109 | 109-115 |
| C – Hip | < 88 | 88-94 | 94-100 | 100-106 | 106-112 | 112-118 | 118-124 | 124-130 |
| D – Arm length | < 72 | 72-74 | 74-76 | 76-78 | 78-80 | 80-82 | 82-84 | 82-84 |
| E – Inseam length | < 76 | 76-78 | 78-80 | 80-82 | 82-84 | 84-86 | 86-88 | 86-88 |
Chest – circumference measured in widest place
Waist – circumference measured in narrowest place
Hip – circumference measured in widest place
Arm length – measured from neck line to wrist
Inseam length – measured from crotch to ankle
Please note that given measurements apply to average body proportions. When chosing a size, please consider specifics of your own body.
| Weight / Height | 159-164 cm | 165-170 cm | 171-176 cm | 177-182 cm | 183-188 cm | 189-194 cm | 195+ cm |
| W 60-66 kg | XS | XS | XS | XS | XS | – | – |
| W 67-72 kg | XS | XS | S | S | XS | – | – |
| W 73-79 kg | – | – | M | M | S | M | – |
| W 80-88 kg | – | – | XL | L | M | M | L |
| W 89-98 kg | – | – | XL | XL | L | L | XL |
| W 99+ kg | – | – | – | 3XL | XXL | XXL | 3XL |
Low to Medium Compression
A relaxed fit, allowing for full freedom of movement without compromising on performance. Designed for every day rides, where comfort is key.
Product Reviews
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Submitted 8.11.2025
By Laurens
Good value for money
Good quality, acceptable price. Thinner than I expected, but the merino does its thing and is warmer than you expect it to be. Good breathability. Do check the sizing: I ordered small because of measurement chart and it fits me good, but I usually have a size large.Show full review -
Submitted 16.4.2026
By Martin
Top quality lightweight baselayer
I bought this specifically to go with my Alternative Ultralight Long Sleeve Jersey, which is close-fitting. They play very nicely together! It is made from a soft, stretchy fabric and wicks sweat efficiently. I have various other Isadore merino baselayers, and it's really handy to have a lighter option to go with other (Isadore) long sleeve jerseys. I chose the vapor colour, which is pale grey so it goes with just about any other kit. Highly recommended.Show full review -
Submitted 31.12.2025
By Maarten
Top long baselayer
Very nice fabric, very comfortable and great fit. Great Isadore quality. The fabric is relatively thin compared to another Isadore baselayer I bought earlier so perhaps not best for those really cold winter rides but more for intermediate conditions.Show full review
Merino Long Sleeve Baselayer 150g
Origin of raw material
Poland
Country of origin of the fabric
Lithuania
Country of origin of the finished product
Final product from Lithuania with Higg Facility Environmental Module
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