Icebreaker
Icebreaker 175 Everyday Long Sleeve Half Zip (men's, size M)
- Weight: 7/10 How much it adds to your pack.
- Warmth: 6/10 How much the fabric insulates next to your skin. Heavier fabric is warmer and slower to dry.
Cool-weather hill days where you want to vent heat with the zip
- Weight
- 195 g (M)
- Fabric weight
- 175 g/m²
- Fibre
- Merino
- Merino
- 100%
Where to buy
Icebreaker £79.99 In stock. Free delivery. Black, size M. Free standard delivery over £40; free returns.
View at shop: IcebreakerBlacks £80 In stock. Delivery £4.99. Black, size M. Free delivery over £95. The shop's page gives a wrong weight of 290 g.
View at shop: BlacksPrices checked 8 Nov 2026 on each shop's own page; shops can change them. We earn no commission on these links; shops are listed by price. More
Our ratings (out of 10)
1 to 10, compared with the whole market. Each says what it's based on. How we score
Weight
From maker's figures 7/10How much it adds to your pack. 7: Better than most.
195 g in men's size M (Icebreaker UK) is in the 160–199 g band, near the heavy end. Blacks gives 290 g; we use the maker's figure.
Warmth
From maker's figures 6/10How much the fabric insulates next to your skin. Heavier fabric is warmer and slower to dry. 6: A bit better than average.
175 g/m² is in the 150–189 g/m² band. The figure is Icebreaker's own: the 175 in the product name is its fabric weight class, and its base layer guide puts its lightest layers at 75–175 g/m². Alpinetrek lists 175 g/m² for the half zip too. It is the maker's class, not a lab reading.
In short
Good for
- Cool-weather hill days where you want to vent heat with the zip
- Light three-season layering under a fleece or shell
- Travel and multi-day trips where a merino top beats a synthetic one for smell
- Sleeping in on cool nights in a tent
Strengths
- 100% merino with a half-length zip and stand-up collar for ventilation and extra neck cover
- Rib-knit fabric with stretch and a slim fit that sits close under a jacket
- 195 g in men's M, light for a zipped top
Weaknesses
- No independent hands-on test found, so comfort, odour and durability are estimates, not reviewed scores
- Light 175 g/m² fabric: not warm enough alone for a cold night
- Pure merino with no nylon: expect it to thin sooner than a nylon-core blend with hard use
- Do not tumble dry, and close the zip before washing
Sources
We haven't tested this ourselves. Every score comes from these specs, tests and reviews.