Men's Merino Blend 200 Realfleece™ Descender Long Sleeve Half Zip Top

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A lightweight and versatile merino mid layer ideal for high-intensity pursuits in cool to cold conditions, the Merino 200 Realfleece™ Descender Long Sleeve Half Zip features underarm panels of Cool-Lite™ mesh for optimal ventilation.
Easy online & in-store returns - up to 30 days

You can return icebreaker that you purchased directly from as long as it is unworn, unwashed, and in the original packaging with tags attached. We have extended our returns period and this may be returned for a refund for any reason within 30 days from the ship date.

Refunds will be issued based on the original form of payment.

We reserve the right to limit returns.

All Returns must be arranged through our Online Return Authorization Request at

We cannot accept Cash on Delivery.

Please allow up to 10 working days for your return to be inspected and a refund given.

Need more help? Contact us here.

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Features & details
Realfleece™ - Brushed icebreaker merino wool provides warmth and softness next-to-skin
Cool-Lite™ - Breathable and lightweight fabric blend designed to help keep you cool
Hidden chest pocket
Offset shoulder seams to prevent friction
Underarm panel in eyelet mesh for ventilation
Thumb loops to keep your sleeves in place and hands warm
Offset side seams
Dipped hem for extra coverage

Mid Layers

Product weight
Medium= 234g/8.26oz
Good for
Running Running
Hiking Hiking
Fabric & care
Fabric content
Shell: 60% lyocell, 40% merino wool lining/inner binding/pocket lining: 60% lyocell, 40% merino wool, exclusive of decoration and elastic
Warmth system
200 Lightweight 
Merino fiber micron
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. Line dry in shade. Cool iron. Do not dry clean.

Our fabric numbering system.

The bigger the number,
the warmer you'll be.

Choose your comfort level with our fabric weight numbering 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.

thickness graph
Fit & sizing
Key product measurements
Back High Point Shoulder to Hem: 71.5cm (Based on size M)
What's your size?
See our Size Guide
Slim Fit - A snug, close-to-body fit for low-bulk layering.
What is Cool-lite™?
A lightweight and breathable fabric blend that is designed to efficiently manage moisture away from your body.
Moisture wicking symbolBreathable
Cool weather symbolCool in warm conditions
No stink symbolNaturally odour resistant
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natural fibres for all-mountain performance

Introducing lightweight RealFleece™ mid layers made for all-mountain performance.
Crafted from 100% plastic free fibres: natural merino wool keeps your temperature regulated, while Cool-lite™ made with TENCEL™ Lyocell keeps things light and breathable.
Think base to peak, without the plastic-induced sweat.