How to care for merino wool

Why Care Matters More Than You Think

The longer a garment lasts, the less it costs you per wear. This is the single most important calculation in clothing.

A €60 cotton t-shirt that you wear thirty times before it loses its shape costs you €2 per wear. A €100 merino t-shirt that you wear three hundred times — easily achievable with proper care — costs you €0.33 per wear. By any measure, the merino t-shirt is the cheaper garment.

But the financial math is only half of it. According to multiple lifecycle studies, 25–30% of a garment’s total environmental footprint comes from how it’s washed and dried during its lifetime — not from how it’s manufactured. Washing less, washing colder, and skipping the tumble dryer collectively make a bigger environmental difference than almost any other consumer decision.

Care isn’t a chore tacked on at the end. It’s the lever that determines whether a garment is a five-year investment or a five-month expense.

That’s why we built this guide.

Wash Less, Wash Gently

Wear more, wash less

The first rule of merino care is counterintuitive: most of the time, don’t wash.

Merino wool is naturally antibacterial. The keratin in the fiber binds and neutralises the volatile compounds that bacteria produce when they feed on sweat — which is what creates the smell of unwashed clothes. In cotton or polyester, those compounds accumulate; in merino, they don’t.

In practice, this means:

• A merino t-shirt typically needs washing every 5–7 wears
• A merino sweatshirt or knit can go 8–12 wears between washes
• An odorless garment that’s been aired overnight is genuinely clean

Compare that to cotton, which usually needs washing after every single wear, and you’ve already extended your garment’s life by a factor of five just by treating it correctly.

How to know when it actually needs a wash

Skip the routine and look for real signals:

• Smell test. If the garment smells fresh after airing overnight, it doesn’t need washing. If it smells like you, it does.
• Visible soil. Food, dirt, or anything else that left a mark.
• Heavy sweat day. A long run or a humid summer day.
• Skin contact areas. Underarms and collar are the giveaway zones.

If none of those apply, hang it overnight in fresh air and wear it again tomorrow.

How to wash, step by step

When the time comes:

1. Turn the garment inside out. This protects the outer surface and reduces friction-related pilling.
2. Use cool water — 30°C or lower. Heat is what damages wool fibers. A cool wash is gentler and just as effective for normal wear.
3. Select a wool or delicates cycle. Shorter, slower agitation. If your machine has no wool setting, use the gentlest cycle available.
4. Use a mild detergent, preferably a wool-specific one. Regular detergents are too alkaline and can strip the natural lanolin. Wool detergents are pH-balanced for keratin fibers.
5. Skip the fabric softener. It coats the fiber, reducing breathability and the natural antibacterial effect.
6. Wash with similar colors, in a half-full machine. Less friction means less pilling.
7. Don’t wring or twist. Lift the garment out gently, supporting its weight.

That’s it. No special equipment, no expensive products.

Reading the wash symbols

Most merino garments — including ours — carry these labels:

• Wash tub with one dot and “30”: Cool wash, 30°C maximum
• Triangle with diagonal lines: Do not bleach
• Square with a circle, crossed out: Do not tumble dry
• Iron with two dots: Iron at medium temperature (rarely needed for merino)
• Circle with “P” or “F”: Professional dry cleaning permitted (we don’t recommend it)

If a symbol looks unfamiliar, it’s almost always a “don’t do this” version of a standard symbol. Cross-outs mean exactly what you’d expect.

Hand washing — the gentlest option

For favorite pieces, hand washing extends life further:

1. Fill a clean basin with cool water
2. Add a small amount of wool detergent (a teaspoon is enough)
3. Submerge the garment and press gently — don’t rub or scrub
4. Let it soak for 10 minutes
5. Drain, refill with cool clear water, and press through to rinse
6. Press out excess water — never wring

The whole process takes ten minutes and is the difference between a garment that lasts five years and one that lasts ten.

Common mistakes (and how to avoid them)

• Washing too often. The single biggest cause of premature wear. Trust the smell test.
• Hot water. Anything above 30°C risks shrinkage and felting. Even handwashing should be cool.
• Regular detergent. Strips lanolin, leaves residue, makes the fiber feel stiff over time.
• Tumble drying for “just five minutes.” Even a brief hot tumble damages the fibers.
• Overfilling the machine. More friction, more pilling, more fiber breakage.
• Bleach. Never. It destroys keratin.

Lay Flat, Away From Heat

Drying is where most merino damage happens. Heat is the enemy of wool — more than water, more than detergent, more than wear. Every drying step that involves heat shortens the garment’s life.

The cardinal rule: no tumble dryer

Tumble dryers do two things to merino: they heat it (shrinking and felting the fibers) and they tumble it (breaking down the structure mechanically). Even on “low” or “air” settings, the friction is harsher than the wool can handle long-term.

The only acceptable use of a tumble dryer for merino is removing lint between wears, with no heat, for under a minute. That’s it.

Lay flat to dry — the right way

1. Press, don’t wring. After washing, gently squeeze water out — never twist.
2. Roll in a clean towel. Lay the garment flat on a clean towel, roll the towel up with the garment inside, and press to absorb water. This dramatically cuts drying time.
3. Lay flat on a drying rack. Use a flat mesh surface, not a hanger. Hanging knitwear lets gravity stretch the shoulders and lengthen the body.
4. Reshape while damp. Pat the garment back to its natural dimensions before it dries.
5. Away from direct sun and heat. Sun fades color and can damage fibers. Radiators harden them. A room-temperature spot with airflow is ideal.
6. Allow 24 hours. Merino dries faster than cotton, but never rush it. Damp wool stored away can mildew.

Speed-drying without damage

If you need a garment dry faster:

• Use the towel-roll method twice with fresh towels
• Place near (not on) a fan
• Position in a well-ventilated room with a slight cross-draft

These methods can cut drying time to 8–12 hours without any heat.

What about ironing?

Most merino garments don’t need ironing. The crimp in the fiber naturally springs back to shape as it dries. If you do iron:

• Use the lowest setting (one or two dots — never wool’s “high” setting on a generic iron)
• Iron inside out
• Use a pressing cloth (a thin cotton towel) between the iron and the fabric
• Steam is gentler than direct contact

For most garments, hanging in a steamy bathroom for ten minutes does the job without an iron at all.

Fold, Breathe, Protect

How you store a garment between wears, and especially between seasons, has more impact on its longevity than most people realize.

Day-to-day storage

After each wear:

• Air the garment overnight on a flat surface or a wide hanger. This lets moisture and odors dissipate.
• Refold knitwear before putting it away. Don’t leave it crumpled.
• Hang only structured pieces (like a merino blazer or wool overshirt) — and only on wide, padded hangers.

Folding vs. hanging

For knitwear — t-shirts, sweatshirts, sweaters — fold, always.

Hanging knitwear lets gravity do slow violence to it. The shoulders stretch where the hanger sits. The body lengthens. After a few months, the garment loses its shape and never quite returns to it.

The right way to fold a merino t-shirt:

1. Lay it face-down on a flat surface
2. Fold one sleeve straight across the back, then fold the side in
3. Repeat on the other side
4. Fold the bottom hem up to just below the collar
5. Stack with light pressure — don’t compress

A folded merino garment can sit in a drawer for months without losing its shape.

Storage between seasons

When you put summer or winter pieces away for several months:

1. Wash first, always. Stored garments with traces of body oil, sweat, or food attract moths. Clean garments don’t.
2. Make sure they’re completely dry. Even slightly damp wool will mildew in storage.
3. Use breathable cotton storage bags. Plastic bags trap moisture and accelerate fiber breakdown. A simple cotton drawstring bag is enough.
4. Add a natural moth deterrent. Cedar blocks, lavender sachets, or rosemary. Refresh every 3–4 months. Avoid mothballs — they’re toxic, smell terrible, and aren’t necessary for clean garments.
5. Store in a cool, dark, dry place. A closet shelf is fine. An attic is too hot, a basement too humid.
6. Don’t stack too high. Excess weight crushes the fiber’s natural crimp over time.

When you take garments out at the start of a new season, give them a quick air outside for a few hours before wearing.

Travel storage

Merino is the ideal travel garment — it resists wrinkles, doesn’t need washing, and packs small. Some travel tips:

• Roll, don’t fold. Rolling reduces wrinkle creases and saves space.
• Pack inside a packing cube with breathable mesh, not a plastic bag.
• Refresh on arrival. Hang in the bathroom during a shower, or air outside for an hour. Steam from the shower removes most travel creases.
• Wear it, air it, repack it. You can wear the same merino t-shirt for a full week of travel if you air it between uses.

Most Problems Are Fixable

A small flaw doesn’t end a garment’s life. Most common merino issues — pilling, loose threads, small holes — can be fixed in minutes with the right approach. We’d rather help you keep a garment than have you replace it.

Pilling — the most common (and most fixable) issue

Pilling is the small balls of fiber that form on a garment’s surface, usually in friction areas like under the arms or where a bag strap sits.

What it is: Short fibers working themselves loose and tangling together. It’s most common in the first few weeks of wear — once those short fibers are out, the garment will stop pilling.

How to remove pills:

• Wool comb (preferred): A small wooden-handled comb with fine metal teeth. Lay the garment flat, hold the fabric taut, and run the comb gently across the surface. Pills lift off cleanly. Costs around €5 and lasts a lifetime.
• Fabric shaver: A small battery-powered tool that shaves pills off mechanically. Faster than a comb, slightly less gentle. Best for larger garments.
• Razor (last resort): A new disposable razor can work on flat areas, but it’s easy to nick the fabric. Use with caution.

What not to use: scissors (you’ll cut the fabric), sticky tape (pulls fibers loose), or the “stretch and pluck” method (creates more loose fibers).

Once you’ve de-pilled a garment, washing it inside-out from then on will dramatically slow new pilling.

Small holes — basic darning

A pinhole or small snag in merino can be repaired so it’s barely visible.

Quick repair kit:

• A fine needle (smaller than a regular sewing needle)
• Matching wool thread (we can send you offcuts — write to us)
• Small embroidery hoop (optional but helpful)

Basic darning method:

1. Place the hole over the hoop or stretch the fabric gently between fingers
2. Anchor the thread on the inside of the garment, just outside the hole
3. Make small parallel stitches across the hole in one direction
4. Then weave perpendicular stitches over and under the first set
5. Tie off on the inside

For most pinholes, this takes under five minutes and the repair becomes nearly invisible after the first wash.

Pulled threads — never pull or cut

If a thread pulls loose, your instinct is to grab it and pull. Don’t.

Instead:

1. Find the loose thread
2. From the inside of the garment, gently pull the thread back through to the underside
3. If you can’t reach it, use a needle to pull it through from the inside
4. Once on the inside, the thread is invisible from the outside

Cutting a pulled thread can unravel the surrounding stitches.

When Something Goes Wrong

When A Garment Is Truly Done

Some garments, after years of wear and multiple repairs, do reach the end of their useful life. Merino has one final advantage over almost every other fabric: it returns cleanly to the earth.

A 100% merino garment, buried in healthy soil, biodegrades in roughly 6–12 months, releasing nitrogen and sulfur back into the soil. By contrast, a polyester garment takes 200+ years to break down — and sheds microplastics the entire time.

When a merino garment of ours has truly finished its life with you:

• Compost it at home. Cut into strips, bury in your compost pile. It will be unrecognisable within a year.
• Use it as cleaning rag first. Cut into squares and use to dust, polish, or clean — merino is gentler than microfiber and doesn’t shed plastic.
• Pass it on. A well-loved merino garment, even with some wear, can have a second life with someone else. Donate to a charity that accepts wool.
• Return to us (for the right pieces). If you’ve completely worn through one of our pieces, write to us at hope@durablejourney.com. We’re exploring a take-back program for fiber recycling — we may be able to give your old garment a final job.

The full cycle: from a sheep grazing in Uruguay, to a yarn spun in Italy, to a garment worn for a decade, to soil that grows food. That’s the journey we mean.

The Whole Guide In 30 Seconds

Save this card. Bookmark this page. Or just remember the principle: wash less, dry slow, store dry.

Your garments will repay you for years.