How to Properly Wash Merino Wool Products: Machine Washing, Hand Washing, and Care Frequency

Have you ever wondered, “I want to wash my Merino wool products, but since they are made from wool, how should I wash them properly?” If Merino wool products are washed in the same way as ordinary clothing, they may shrink or become damaged.

Merino wool is sensitive to heat, so using a high-powered dryer can cause shrinkage. For this reason, it should be air-dried naturally. In this way, there are several important points to keep in mind when washing Merino wool products.

In this article, we will introduce two washing methods: using a washing machine and hand washing. We will also explain how often Merino wool should be washed, so please read through to the end.

First, Check the Care Label

Before washing, be sure to check the care label attached to the product. The care label indicates whether machine washing is allowed, how to hand wash, what water temperature can be used, whether dry cleaning is possible, and other important care instructions.

Although this article introduces how to wash Merino wool products, some products may not be suitable for machine washing at all. Please always check the care label before washing.

About Care Label Symbols

For home washing, care label symbols are generally divided into five categories: washing, bleaching, ironing, drying, and professional cleaning. The meanings of each symbol are published by Japan’s Consumer Affairs Agency, so please compare them with the care label on your Merino wool product.

Reference: Consumer Affairs Agency | New Care Label Symbols

How to Wash Merino Wool Products: Washing Machine Method

Here, we will explain how to wash Merino wool products using a washing machine.

STEP 1: Turn the Garment Inside Out and Place It in a Laundry Net

Before washing in a machine, turn the product inside out and place it in a laundry net. Turning it inside out helps protect the surface and prevents fuzzing, pilling, and snagging.

STEP 2: Use Cold Water and Wool Detergent

Merino wool is sensitive to heat, and washing it with hot water may cause shrinkage. Therefore, we recommend washing with cold water or lukewarm water below 30°C. Prepare a detergent designed for wool, or a detergent for delicate garments, and use the appropriate amount. Avoid strong detergents and bleach, and wash gently.

STEP 3: Select the “Hand Wash” or “Wool” Cycle

Set the washing machine to the hand wash mode or wool cycle. A regular washing cycle may involve strong rotation and friction, which can damage Merino wool fibers. The hand wash or wool cycle washes more gently, helping maintain the product’s shape and texture.

STEP 4: Dry in a Well-Ventilated Place

After washing, dry the garment in a well-ventilated place. Avoid direct sunlight and allow the product to dry naturally. This helps maintain its shape and texture, allowing you to enjoy it for longer.

When drying, we recommend hanging it on a thicker hanger. Please avoid thin wire hangers, as they may cause the garment to lose its shape.

How to Wash Merino Wool Products: Hand Washing Method

Here, we will explain how to wash Merino wool products by hand.

STEP 1: Prepare a Washing Solution Below 30°C in a Basin

Fill a basin with cold water or lukewarm water below 30°C. Add an appropriate amount of detergent to create a washing solution.

STEP 2: Turn the Garment Inside Out, Fold It, and Gently Press Wash

Turn the garment inside out and soak it in the washing solution. Gently press wash to remove dirt. Avoid rubbing, as friction may damage the product.

STEP 3: Once the Dirt Is Removed, Change the Water and Rinse

Once the dirt has been removed, replace the water in the basin and rinse the product carefully. Wash away any remaining detergent with clean water.

STEP 4: Finish by Letting the Wool Absorb Fabric Softener Diluted in Water

Finally, we recommend using fabric softener. Dissolve it in cold water or lukewarm water below 30°C, soak the washed wool for a few minutes, and then rinse thoroughly.

Fabric softener helps condition wool fibers, much like how conditioner smooths the cuticle after shampooing hair.

STEP 5: Keep the Garment Folded, Place It in a Laundry Net, and Spin-Dry It in the Washing Machine

Keep the product folded, place it in a laundry net, and spin-dry it in the washing machine. When spin-drying, choose a gentle spin speed, such as a low-speed setting. Strong rotation may damage the fibers.

Also, do not wring the garment by hand before placing it in the washing machine, as this can damage the fibers.

Alternatively, place the product on a large towel and roll it up from one end to absorb moisture. This method is gentler and helps the product last longer.

STEP 6: Dry in a Well-Ventilated Place

STEP 6 is the same as the washing machine method. After washing, avoid direct sunlight and dry the garment in a well-ventilated place. We recommend hanging it on a thicker hanger.

How Often Should Merino Wool Products Be Washed?

Merino wool has natural antibacterial properties and helps suppress the growth of bacteria that cause unpleasant odors, so it generally does not need to be washed frequently.

However, the ideal washing frequency depends on the type of item and how it is worn. Here are a few examples for reference.

T-Shirts and Shirts

T-shirts and shirts should generally be washed after one or two wears. However, if you sweat or notice any stains, we recommend washing them each time.

Sweaters and Cardigans

Sweaters and cardigans are usually best washed after 5 to 10 wears. These items have less direct contact with the skin, so sweat and body odor are less likely to soak into the fabric.

As a result, frequent washing is not necessary. For everyday care, wipe stained areas with a damp towel or brush off dust with a clothing brush to keep the item clean.

Blankets

Blankets do not need to be washed frequently, so washing them once or twice a month is generally enough. However, if you notice stains, odors, or allergy symptoms, washing them once or twice a week may be better. Seasonal changes are also a good time to wash blankets.

Socks and Underwear

Items that come into close contact with the skin, such as socks and underwear, should be washed after each day of wear. Areas that absorb sweat from the feet or body are especially prone to bacterial growth, so frequent washing is necessary to maintain cleanliness. After washing, dry them thoroughly in a well-ventilated place to keep them hygienic.

Recommended Merino Wool T-Shirts Available at C-one

Here, we introduce our recommended Merino wool T-shirts available at C-one. At C-one, we select Super100’s Merino wool with careful consideration of softness, luster, and durability. If any item catches your eye, please visit the product page for more details.

C FLEX Merino Wool T-Shirt

This T-shirt features an integrated structure from the shoulder to the sleeve area, making it easier to move the arms while expressing a stress-free and flexible design. It is also made with wool material for exceptional comfort.

Compared with ordinary T-shirts, this innovative design flexibly follows the movement of the arms and body. Its special shape allows the arms to move more easily and freely.

In addition, C-one’s unique sewing techniques create a stress-free wearing experience for comfortable everyday wear. The C FLEX T-shirt is one of C-one’s signature products, made in Japan with high-quality wool material and a strong commitment to quality.

C BASIC Merino Wool T-Shirt

A short-sleeve T-shirt made from 100% fine Merino wool with natural temperature-regulating properties.

Available in five colors: Dark Navy, Royal Blue, Lavender, Light Pink, and Dark Brown. This versatile T-shirt can be styled for many different occasions. Designed as a unisex piece, it is not limited to men’s or women’s wear.

C HIGH END Merino Wool T-Shirt

The C HIGH END Merino Wool T-Shirt is a made-in-Japan item designed with a slightly higher neckline to help prevent jackets from directly touching the skin.

Compared with conventional T-shirts, it can reduce friction and discomfort around the collar. It is made with high-quality fine Merino wool, offering a smooth touch, good breathability, and a less stuffy feel.

It can be worn comfortably even in summer. Crafted by skilled Japanese artisans, this high-quality T-shirt pairs well with jackets and works beautifully across a wide range of settings, from business to casual wear.

C FLEX Merino Wool Polo Shirt

A polo shirt made from 100% fine Merino wool with natural temperature-regulating properties.

With its collared design, it is also ideal as a uniform for people whose work involves physical movement. Of course, it is also suitable for sports such as golf.

It can also be worn under a jacket, making it suitable for business settings. From work to sports, this single piece can be styled in many ways.

Made with high-quality fine Merino wool, it feels smooth against the skin, offers good breathability, and is less prone to stuffiness. It can be worn comfortably even in summer. Crafted by skilled Japanese artisans, this high-quality polo shirt works well across a wide range of settings, from business to casual wear.

Summary

When washing Merino wool products, it is important to check the care label and use the proper detergent and washing method.

By understanding how to wash them by machine or by hand, as well as how often they should be washed, you can care for your products properly and enjoy them for a long time. With the right care, you can preserve the quality and functionality of the product while enjoying comfortable wear for years to come.

C-one’s Merino wool products are designed to be easy to wash at home. We invite you to find your favorite piece.