Model measurements
Height: 5'11" / 180cm. Waist: 28" / 71.1cm. She is wearing size S
Women's Nature Dye Merino 200 Oasis Long Sleeve Crewe Thermal Top IB Glacier
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If you are not satisfied with the products you received or have simply changed your mind about purchasing them after we have e-mailed you your Order Confirmation, you can return them within 30 calendar days of delivery of the products and get a refund, provided that you return the products to us according to the procedure indicated on our Returns Process page.
For all orders placed between 03/12/2024 and 31/12/2024, the return period is extended. If you change your mind, you can return the product until 31/01/2025. After 31/12/2024, the standard return policy applies (a 30-day policy).
Read our full Return Policy.
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- Features
- Gold Winner in the Outdoor Base Layer category at ISPO
- 100% Merino - Soft merino fibers that regulates body temperature in all weather conditions and resists odors
- Nature Dye - Ethically sourced plant-based dyes that use less water and naturally fade with time
- Gusseted underarms for mobility and comfort
- Flatlock seams to prevent friction
- Back High Point Shoulder to Hem: 69.3cm based on size M
- Style
- #105500
- Product weight
- Medium = 210g / 7.40 oz
Base Layers
- Fabric content
- 100% Merino Wool
- Care
- Machine wash cold (30°C); delicate cycle. Wash with like colors. Do not use softeners. Fasten all closures to wash and dry. Do not bleach. Do not tumble dry. Flat dry in shade. Cool iron. Do not dry clean.
Our warmth system.
The bigger the number, the warmer you'll be.
When choosing your layers, consider in which conditions you plan to use the products, and let yourself be guided by our warmth system.
Our merino fiber measurement.
The smaller the micron,
the finer the fiber,
the softer it feels.
The diameter of a merino fiber is measured in microns – where one micron equals one millionth of a meter.
icebreaker’s merino fibers range from 15.5 – 23.5 microns to ensure a soft hand feel across our skin to outer layers. Finer fibers feel softer because they bend more easily when in contact with the skin.

- Model measurements
- Height: 5'11" / 180cm. Waist: 28" / 71.1cm. She is wearing size S
- What's your size?
- See our Size Guide
Our Oasis base layers are what we’re famous for. These best-sellers are designed to contour the body and will easily flex with you, allowing maximum movement, whatever the activity. The Oasis Nature Dye fabric is dyed in natural compounds and dye stuffs producing beautiful pigment colour that will evolve and fade over time naturally. Not too heavy, not too light, it’s made from 100% merino midweight jersey, making them your go to base layers for year-round layering and everyday comfort. Enjoy the natural benefits of merino, including odour resistance and temperature regulation, keeping you warm whilst not overheating.