Model measurements
Height: 187cm / 6'1". Waist: 86cm / 33". Michael is wearing size M.
Men's Merino icebreaker Anniversary Original Long Sleeve Half Zip Top
Details
Product Actions
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.
- Features
- 100% Merino - Soft, lightweight and naturally odour resistant fibre that keeps you warm when it’s cold and cool when it’s warm
- Bodymapped performance knit structures for breathability
- Seam-free construction for comfort
- Coronet Stripe textural design on sleeve
- Special anniversary edition hang-tag
- Rib collar, sleeve cuffs and bottom hem
- Style
- #0A579D
- Product weight
- M= 5600 g/197.6 oz
Mid Layers
- Fabric content
- 100% Merino wool. Exclusive of decoration
- Merino fiber micron
- Care
- Machine wash cold gentle cycle. Wash with like colors. Do not use softener. Close all fasteners before washing. Do not bleach. Do not tumble dry. Dry flat in the shade. Do not iron. 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: 187cm / 6'1". Waist: 86cm / 33". Michael is wearing size M.
- What's your size?
- See our Size Guide
Free of plastic microfibres and petrochemical-based synthetics, this product is made with 100% pure merino fibres that were hand-picked for strength and softness to create a luxurious fabric that naturally breathes and resists odours. Merino wool fibre is naturally renewable, recyclable and biodegradable under certain conditions.


Experience the evolution of a New Zealand icon with our timeless O-Zip, the original icebreaker 100% merino mid layer. Celebrating our 30th anniversary, the new O-Zip reimagines a brand classic with a new seamless structure, offering timeless comfort and modern performance.