Womens Merino Blend 250 Fairisle Jacquard Long Sleeve Zip Neck (Petrol/Lagoon/Orange)
When you're chasing elevation, laying first tracks, or grinding through cold training days, this Merino Blend Half Zip keeps your core dialed without holding you back.
Made from a premium 250gsm fabric – 50% superfine Merino wool (18.5 micron) and 50% recycled polyester, it delivers the perfect harmony of natural warmth, moisture management, and rugged performance. Merino insulates even when wet, breathes like a pro, and keeps odour in check, while recycled polyester speeds up dry times and boosts durability for the long haul.
The half-zip design gives you instant ventilation when you're heating up mid-ascent, and thumb loops keep sleeves locked in and the cold out. Flatlock seams reduce chafing, no matter how many layers you're stacking, and an underarm gusset adds critical mobility.
This is your all-conditions, all-in base layer, built to breathe when you're working, and stay warm when you stop.
- 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
- Thumb loops to keep out the drafts
- Half Zip neck collar for versatile ventilation
- Zip guard & garage for comfort & protection
- 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 S): 262g
- 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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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.
Merino/Polyester Blend
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