I wore the same shirt for six days across the Albanian mountains and nobody asked me to sit further away. That sentence is disgusting and also the entire reason I'll never go back to packing a stack of cotton T-shirts. The shirt was merino wool, and merino's one genuinely strange trick is that it resists smelling like a person for far longer than any fabric has the right to.
This is a gear post about a category, not a brand. I'm not going to tell you which logo to buy. I'm going to tell you what merino actually does, what to look at before you spend the money, and the ways it'll annoy you — because it will.
What it is, and why it works
Merino is wool from merino sheep, which grow an unusually fine, soft fibre — none of the itch you remember from a childhood jumper. Spun into a thin base layer (the shirt or leggings worn next to your skin), it does three useful things at once:
- It regulates temperature. The same shirt keeps you warm on a cold pass and feels fine in the heat, because the fibre manages moisture against your skin rather than trapping it.
- It doesn't stink. Wool naturally resists the bacteria that make sweat smell. This is not marketing — it's the difference between packing one shirt or four.
- It's still warm-ish when damp, unlike cotton, which gets cold and clammy and sulks.
For a traveller, that adds up to carrying less and washing less, which is the whole game. One good merino tee can replace half a packing cube of cotton.
The point of good travel clothing isn't looking sharp. It's owning fewer things and thinking about them less.
What to look for when buying
A few things separate merino worth owning from merino that'll disappoint you:
- Fabric weight, measured in grams per square metre (gsm). Roughly: 150–160 gsm for hot weather and as a summer base layer, 200–250 gsm for cool conditions and colder trips. A ~160 gsm tee is the most versatile single piece for general travel.
- Blends. Pure merino is softest and best at odour control but wears through faster. A small percentage of nylon or another synthetic ("core-spun" merino) makes it noticeably more durable for a tiny cost in feel. For travel, I prefer a blend — the durability matters when it's getting daily abuse.
- Fit and seams. It should sit close without strangling you, and the seams should be flat (flatlock) so a pack strap doesn't rub you raw.
- Honesty about sourcing. If animal welfare matters to you, look for "mulesing-free" wool. Decent makers state it plainly.
Roughly what it costs
Merino is not cheap, and that's the main barrier. Expect somewhere around €60–110 for a good base-layer top, more for heavier or fancier pieces. Leggings and heavier mid-layers cost more again. You can find cheaper merino in the sales and from supermarket outdoor ranges, and some of it is fine; the very cheap stuff tends to be thin, pure merino that holes quickly.
The way I justify the price: one €80 shirt that replaces four €15 cotton ones, lasts years, and lets me travel with a smaller bag is good value, not bad. The way it stops being good value is if you buy it and then treat it like cotton.
Where to buy it
Any proper outdoor or hiking shop will carry a few merino ranges, and that's the best place to start because you can feel the weight and try the fit. Brand-direct websites and the bigger online outdoor retailers have the widest choice and the best sales. Avoid buying your first one blind online — the difference between 150 and 250 gsm is hard to judge from a screen, and fit varies a lot between makers.
The downsides, because there are some
- It holes. Pure, lightweight merino is delicate. Mine tend to get small holes at the pack's hip belt and where a rucksack rubs over months of use. A blend helps; nothing fully fixes it.
- It dries slower than synthetic. If you rinse a shirt in a sink, merino takes longer to dry overnight than a polyester equivalent. In humid places this is a real annoyance.
- The price stings, especially if you need several pieces.
- Moths love it at home. Store it sealed in the off-season or you'll find out.
If those trade-offs sound dealbreaking, a good synthetic base layer is cheaper, tougher, and dries faster — it just smells after a day, so you'll pack and wash more. That's the actual choice: merino buys you fewer clothes and less laundry at the cost of money and a bit of fragility.
My honest take
Merino is the rare bit of travel kit that earned its reputation. On any trip where I'm carrying my own bag and won't have easy laundry — long walks, the guesthouse-to-guesthouse trek across the Albanian Alps, shoulder-season islands where the weather can't decide — it's the first thing I pack and the thing I'd replace first if it vanished. It's also why my whole carry-everything-in-a-small-pack approach actually works: fewer, better clothes.
Would I wear it for a week and wash it far less than is strictly polite? I already told you I did. Start with one ~160 gsm blended tee, treat it well, and see if it changes how much you pack. For more kit I actually carry, see the gear archive.