Mens Merino 150 Short Sleeve Crew (Smoke)
Made from superfine 150gm Merino, this short sleeved top will soon become a staple in your wardrobe, whether you need a base layer for hiking in the mountains or a casual top for the weekend! Merino keeps you warm when it's cold and breathes well when it's warm, keeping you comfortable whatever the weather. It's also quick drying, naturally odour resistant and sustainable. Join our Flock.
- 150gm 18.5 micron Superfine 100% Merino wool
- Ideal to use as a base layer for a multitude of activities, from skiing & hiking, to cycling & running
- Underarm gusset panels for seam free comfort
- Flatlock stitching helps to reduce chafing
- Off set shoulder seams to prevent rucksack straps from rubbing
- Drop tail hem for additional coverage
- Naturally soft, moisture wicking, odour resistant and breathable
- Can be worn on its own, or as part of a layering system for added warmth
- Embroidered ISOBAA sheep logo
- ISOBAA folded hem label
- Easy care & quick drying
- Recycled packaging
- Weight (size M): 150g
- This is an athletic fit, so size up if you prefer a more relaxed fit
Made in China by an internationally audited factory to confirm working conditions are fair, safe, and environmentally sound.
- 100% Merino Wool
- 150gsm
- 18.5µm microns
Fabric weight: 150gsm
Fabric weight (gsm)
GSM means grams per square metre. Higher GSM usually means a thicker knit, more warmth, and better wind resistance.
Lower GSM usually feels lighter, dries faster, and is better for high output.
Fibre diameter: 18.5µm
Fibre diameter (microns)
Microns measure the thickness of each merino fibre.
Smaller microns usually feel softer against skin because the fibres bend more easily. Larger microns usually feel firmer and can be more rugged for outer layers.
| Fibre | Thickness |
|---|---|
| Ultra fine | 15µm |
| Super fine | 17.5µm |
| Fine | 20µm |
| Mid-weight | 22.5µm |
| Coarse | 25µm |
| Human hair | ~70µm |
Merino's natural odour resistance means a simple air between wears is almost always enough, and the less you wash it, the longer it lasts.
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| Materials | 100% Merino Wool |
| Origin | Made in China in a factory independently audited to international standards for fair labour, safe working conditions, and responsible environmental practices, using ethically sourced, non-mulesed Merino wool from Australia |
| Care guide | Isobaa care guide |
- Free shipping (Verenigd Koninkrijk) on orders above £75.
- Orders usually ship within 2–3 days, though may take longer during sales. See the product page for estimated delivery.
- You can return your order within 100 days for a refund. Return shipping is not included. Items must be unworn with tags attached. Exchanges are not currently available.
- See our shipping & returns page for details.
Opties kiezen
Offset shoulder seams
Thoughtfully positioned seams sit away from rucksack straps, eliminating pressure points and rubbing on long days out with a pack
Underarm gusset panels
Seamless underarm panels move naturally with your body, giving you unrestricted movement and all-day comfort
Drop tail hem
A longer hem at the back gives you extra coverage where you need it most, whether you're moving, bending or layering up
Proudly natural
Our Merino wool is ethically sourced from trusted Australian suppliers with a heritage dating back to 1857. We only use non-mulesed wool, working with partners who prioritise animal welfare and responsible land management.
Merino is a renewable, biodegradable fibre that naturally regulates temperature, manages moisture and resists odour, delivering reliable performance with a lighter environmental impact.
100% Merino Wool
Temperature regulating
Keeps you warm when cold, and cool when warm
Moisture management
Pulls sweat away and dries quickly
Odour resistant
Stays fresher for longer
Super soft
Feels smooth and gentle on skin
Recieved it, put it on under everything then wore it 5 days end to end , 3 of which were in the Snowden mountains at a mountain club hut with no electricity , just a wood burner. 2 days walking up to 1000m past snow line… it remained wearable and not pungent all that time, in my opinion. Nobody else in the party of 5 mentioned any odours too, might be the wood burners perfumes of course . I find merino can do this, stay warm and wearable for a good few days as long as it gets a breather at night, ‘to offgas’ , maybe best to change daily but needs must haha.
So top marks!
Thanks for sharing! We’re big supporters of re-wearing, and simply airing merino between wears helps keep it fresh for longer, so it’s great to hear you got several days of use out of it.
The fabric on this shirt felt similar to a regular everyday T-shirt but did seem to have additional warmth properties. It was not tried during warm weather, so cannot attest to summer properties. The petrol blue was a fantastic deep heathery blend, but I have not washed it so cannot attest to color-fastness or fading. Although I liked the longer arms/sleeves, the length did bunch around my waist frequently. Shipping was a bit slow, slower even than the overseas timelines, but it did arrive safely. I don't like tags at the collar so was pleased this was tagless.
Thank you for taking the time to leave a review.
We are pleased to hear you love the color and fabric of the top. We believe you'll find it equally impressive in warmer conditions, offering both comfort and breathability.
If you have any further comments after more use, please don't hesitate to reach out.
Best wishes,
The Isobaa Team
excellent ... and fully Merino .... yeh!
Sizing is small, I’m normally a Large but it was way too small. Had to exchange it for XL.
Fabulous feel and great quality
Really lovely cut and highquality merino teeshirt - I love it!
Slightly loose fit, good material, low odour
Excellent quality. Brilliant fit. Got then for hiking but they are my go to everyday and going out shirt. Get lots of positive comments and where can they get one
Really love the feel of this and the style. The logos are a nice little design touch, and the quality is superb. I have several Isobaa items now, and would recommend them over more expensive alternatives.
Mens Merino 150 Short Sleeve Crew (Petrol)
Great fit and feel
I purchased theee Isobaa products and they are all a great fit for me and the quality of the tops is excellent. I’ll definitely be looking for more in the future, especially the long sleeved tops.
I bought this in Denim and Navy and love it. I can wear it either to do jobs at home or out and about with the family. Will buy again.
Absolutely love the quality of the t shirt I ordered they are very comfortable. I really like what the company stands for being environmentally friendly even down the packaging it came, ultimately a really good experience and will 100% shop there again
Thanks for your feedback! We're happy to hear you had such a positive experience. :)
Love their t-shirts. Quality and cut are top-notch. Fit’s great and the material and all the stitching and details are high quality. Would buy again for sure.
Good base layer that feels comfortable to the skin
excellent high quality item that's well made
Another top product made by isobar my third T-shirt from them and the quality is fantastic as usual will definitely be buying more in the future
So very comfy and it's got a slight stretch which is perfect. Seems to hold up well after repeated wash and dry. Plus no shrinkage after tumble drying several times
A bit tight fitting but very warm and soft
The fit of the t-shirt was absolutely spot on and super comfortable
I have a large Isobar tshirt that is my favourite shirt, not tight and not too loose. I have bought another one because the old one has holes in it and its really tight, I will be sending it back for an XL, I am the same size, Ive not put on weight.
Thank you for your review!
We’re sorry this top felt different from your previous one. If it’s the same model, the sizing should be consistent, though we do offer tops in different fits, active, regular, and relaxed. Each product page includes a size guide with garment measurements, so if your top differs by more than 1cm it may be the wrong size and we'll be happy to replace it. Please get in touch if you need any help.