Why it exists

The trail tee,
worn for a week.

Travel running has one honest constraint: the bag. You cannot pack a clean shirt for every day of a trip built around trails, so the shirt has to be the kind that does not need replacing. Merino is naturally antimicrobial — it resists odour for days of wear where synthetics quit after one — and the fine fibres we use are soft enough to forget at kilometre thirty.

Pure merino is fragile at running weights, so the yarn is core-spun: a thin recycled-nylon core wrapped in merino fibre. All the comfort of wool where it touches skin, the strength of nylon where the vest straps rub. Flatlock seams sit flat under a pack, and the drop tail stays tucked on climbs.