How to Wash Merino Wool: Complete Guide to Machine Washing, Hand Washing and Drying

Pure Merino Wool is a precious natural fibre: soft, thermoregulating and gentle even on sensitive skin. Precisely for this reason, a few simple precautions are needed when washing it to preserve its quality, elasticity and silky feel over time.

In this guide, discover how to wash Merino Wool correctly: by hand or in the washing machine, which temperature to use, which spin cycle to choose and how to dry it without damaging it.

For a general overview covering all types of wool, you can also read our complete guide on how to wash wool without felting it.

Why Merino Wool Should Be Treated Gently

Merino Wool is made up of very fine fibres, finer than traditional wool. This makes it:

• softer against the skin

• more comfortable as a first layer

• more sensitive to heat, friction and sudden temperature changes

The main risk is felting, which can occur when the fibre is “stressed” by:

• water that is too hot

• an aggressive spin cycle

• long or overly vigorous washing cycles

• unsuitable detergents

What Temperature Should Merino Wool Be Washed At?

The golden rule is simple:

✅ cold water or a maximum of 30°C

If washing by hand, use water at a constant temperature and never alternate between hot and cold water.
If washing in the machine, select the wool programme with a maximum temperature of 30°C.

How to Machine Wash Merino Wool Safely

If your washing machine has a suitable programme, Merino Wool can be safely washed in the machine.

Recommended Settings

• Programme: Wool - NOT Delicates. It must be the Wool programme

• Temperature: max. 30°C

• Spin cycle: minimum or reduced (400–600 rpm)

• Duration: preferably short (wool programme)

Practical Tips

• Wash only a few garments at a time and do not overload the drum

• Turn garments inside out

• If possible, use a mesh laundry bag

How to Hand Wash Merino Wool (Extra-Gentle Method)

Hand washing is ideal for very delicate or small garments, BUT extra care is needed because the risk of making a mistake can actually be higher when washing by hand.

Step-by-Step

1. Fill a basin with cold water or water at a maximum of 30°C

2. Add a small amount of detergent for wool/delicate fibres

3. Immerse the garment and move it gently without rubbing

4. Leave it to soak for a few minutes

5. Rinse using water at the same temperature

6. Gently blot with a towel without wringing

Which Detergent Should You Use for Merino Wool?

For Merino Wool, it is essential to choose a detergent specifically formulated for wool or delicate fibres.

A suitable detergent helps to:

• preserve softness

• respect the fibre’s natural elasticity

• maintain colours

• clean effectively even at low temperatures

👉 You can also find more information in our guide dedicated to our detergent for delicate fibres and the correct care of fine garments.

Which Spin Cycle Should You Use for Merino Wool?

✅ 400–600 rpm (or “minimum spin”)

High spin speeds can:

• distort the garment

• stress the fibres

• cause the garment to lose elasticity and shape

How to Dry Merino Wool without Damaging It

Drying is half of the process.

✅ Always dry flat on a towel
✅ Blot away excess water
❌ Do not hang it, as this may distort the garment
❌ Do not tumble dry
❌ Avoid direct heat sources such as radiators or strong sunlight

How to Store Merino Wool between Seasons

Storing garments made from natural fibres correctly is just as important as washing them: it helps keep the fibres intact, soft and fresh over time.

• Store garments clean and dry

• Use breathable cotton bags rather than sealed plastic

• Avoid damp environments

• Protect them with natural solutions such as lavender or cedar

👉 For advice on delicately scenting wardrobes and drawers, see also our guide to our fabric and wardrobe fragrance.

Merino Wool always rewards proper care with comfort, thermoregulation and genuine softness.
By using low temperatures, a gentle spin cycle, a suitable detergent and flat drying, you can help garments last longer and keep them looking beautiful over time.

And when the fibre is natural and high quality, taking proper care of it becomes a simple habit… but one that makes all the difference.

Frequently Asked Questions About Merino Wool

What Temperature Should Merino Wool Be Washed At?

In cold water or at a maximum of 30°C, avoiding sudden temperature changes between washing and rinsing.

Which Spin Cycle Should You Use for Merino Wool?

Use a minimum spin cycle (400–600 rpm) or the spin setting included in the wool programme.

Which Detergent Should You Use to Wash Merino Wool?

Use a detergent specifically formulated for wool/delicate fibres, suitable for gentle washing at low temperatures.

Can Merino Wool Be Machine Washed?

Yes, using the wool programme, at 30°C and with a reduced spin cycle.

How Should Merino Wool Be Dried?

Always dry it flat, gently blotting it with a towel. Do not hang it and do not tumble dry.