









Mens Merino Blend 250 Geometric Jacquard Long Sleeve Crew (Smoke/Charcoal)
This Merino Blend Long Sleeve Crew is your go-to winter base layer, built to handle high-output days in the snow or low-key layering under city shells. Made from a 250gsm performance knit – 50% superfine Merino wool (18.5 micron) and 50% Recycled Polyester, it strikes the perfect balance between warmth, breathability, and long-haul durability. Merino keeps your body temperature steady, naturally wicks sweat, and stays fresh after full days of wear. The recycled polyester adds strength and faster dry times, so you're never weighed down.
Designed with movement in mind, this top features an underarm gusset for unrestricted reach and flow, plus flatlock seams that sit smooth against the skin for zero chafe, even under a pack. The jacquard knit pattern adds a subtle hit of texture and style, while the scooped rear hem gives you added coverage right where you want.
Layer it up, ride it hard, wear it out. This is your new cold-weather essential.
- 250gsm 50% Superfine Merino 18.5mic, 50% Recycled Polyester
- Jacquard knit pattern
- Flatlock stitching to help avoid chafing
- Underarm gusset construction to aid freedom of movement
- Scooped rear hem for extra coverage
- Perfect for cold weather activities
- Naturally soft, moisture wicking, odour resistant and breathable
- Embroidered ISOBAA sheep logo
- ISOBAA folded hem label
- Non-mulesed merino
- Recycled & recyclable packaging
- Weight (size M): 265g
- 250gsm 50% Superfine Merino 18.5mic, 50% Recycled Polyester
- 50% Merino, 50% Polyester
- 250gsm
- 18.5µm microns
Fabric weight: 250gsm
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 | 50% Merino, 50% Polyester |
| 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.
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