Mar Extrafine Merino T-Shirt

When to use — Trail running and trekking as a standalone or baselayer. Active use and warm conditions rather than cold-weather insulation.

150gsm — weight class matters. 150gsm is at the lighter, more breathable end of the merino spectrum. Those looking for a warmer merino layer should consider the Heimdall baselayer. This is the warm-weather and high-output choice.

Multi-day use — Merino’s natural odour resistance means the Mar can be worn for multiple days without washing — practically useful on multi-day trips where carrying fewer items matters.

Core-spun nylon — 13% nylon is core-spun inside each yarn rather than blended at the fibre level. This adds structural strength and faster drying without the nylon touching skin — preserving the next-to-skin softness of pure merino.

UPF 40 — Meaningful UV protection for open-terrain use where a lightweight tee is the only layer.

Ethics — all of our merino is non-mulesed

Fabric
150gsm
87% merino wool, 13% core-spun nylon

Seams
Low-profile overlocked seams to reduce bulk and chafe

Details
Underarm articulation panels
Dropped rear hem
UPF 40 sun protection
Subtle printed chest and rear logos
Contrast back neck tape

Weight & fit
138g

Care
Machine wash 30°C — gentle wash
Dry flat
Cool iron if needed
Do not tumble dry, do not dry clean, do not bleach