A "just right" warmth-boosting wear that turns your body heat into an ally. NEUTRALWORKS. delivers the ideal indoor experience

Do you ever struggle with how to spend time indoors during winter?

Turn on the heater and the air gets dry; turn it off and it's cold. Dress too warmly and you can't move freely; dress too lightly and you're freezing. Every winter, I find myself torn between adjusting the room temperature and choosing what to wear.

Especially since the pandemic, many of us have been seeking a more comfortable life at home, and I've found a hint that might help. Roomy enough to relax in, yet easy to regulate your body temperature—this ideal roomwear comes from "NEUTRALWORKS." (Neutral Works), created by Goldwin, the long-established sportswear maker.

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TOVE Sweat Long Sleeve GREY ／ TOVE Sweat Long Pants GREY

What is NEUTRALWORKS.?

This is a brand that supports comfortable indoor living for busy people, using "Kodenshi®," a special material developed based on medical knowledge, to help restore balance to both mind and body.

Think of the calm state your body and mind reach after cooling down from exercise, or the pleasant feeling upon waking in the morning. NEUTRALWORKS. guides you toward that "neutral" state of balance, where you can perform at your very best.

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Discovering its features

In the cold season, what we're really looking for might be a "just right" warmth—not too hot, not too cold. The appeal of NEUTRALWORKS., which brings that comfortable warmth, lies in the way "Kodenshi®" technology adapts to the wearer's own body temperature.

What is "Kodenshi®"?

It provides comfortable warmth—never too hot, never too cold.

The fibers of "Kodenshi®" are blended with high-purity ceramic microparticles.

Ceramics are a material that reflects heat via a far-infrared effect, helping retain warmth. This special ceramic transforms your body heat into a comfortable warmth, creating a sensation like being wrapped in the gentle warmth of the sun, simply by wearing it. While conventional materials of this kind often only work efficiently at high temperatures, "Kodenshi®" is able to efficiently radiate far-infrared rays using body heat alone.

In other words, the material begins retaining warmth from the wearer's body heat alone. This technology has been granted not only a domestic patent but also international patents in 10 countries, and its effect lasts permanently no matter how many times you wash it. Many common heat-retaining functional fabrics need to be replaced after about three years as their effect fades, but Kodenshi® stands apart on this point.

It doesn't get too hot, can be worn year-round, and stays comfortable at all times.

Materials that generate heat by absorbing moisture such as sweat work through "heating." In warm indoor spaces, this can make you feel too hot, and once humidity reaches saturation, the material may stop generating heat altogether.

Kodenshi®, on the other hand, works through "warmth retention." Because it uses your own body heat for comfortable warmth, it can maintain a natural warmth indefinitely—this is the key difference from heat-generating materials. Moisture-absorbing heat-generating materials that overheat can, in some cases, even interfere with restful sleep.

Because it isn't a surface treatment.

Since the ceramics are blended directly into the fibers, there's much less risk of peeling or abrasion compared to a surface treatment.

Another reason is that ceramics themselves are chemically stable substances, resistant to physical wear as well as chemical reactions caused by water or detergent.

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Two series, two distinct feels

At ZUTTO, we carry the "TOVE" and "HERMIA" series, both of which make use of this Kodenshi® technology.

TOVE Sweat Long Sleeve BLACK ／ TOVE Sweat Long Pants BLACK

【NEW】HERMIA Pajama Shirt ／ HERMIA Long Pants

Both series use fabric that can be worn year-round, but what's the actual difference between them? Comparing the fabrics revealed both shared traits and distinct differences.

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What functionality do all NEUTRALWORKS. products share?

As a brand dedicated to supporting comfortable sleep and comfortable living, both series share the following features.

◆ Comfortable warmth retention with "Kodenshi®"

It resolves the excessive heat often associated with conventional moisture-absorbing heat-generating materials, as well as the chilling caused by resulting sweat, keeping you at a comfortable temperature.

◆ Superior odor-eliminating effect with the deodorizing material "Maxi Fresh"

Sweat and odor from sleep are less noticeable, so you can use it with confidence both in everyday life and while staying away from home.

Since it has the power to reduce unpleasant odors, it's recommended for those sensitive to smell, those who want to stay fresh at all times, It's a brand you can choose with confidence, even if you're mindful of things like staying over at someone's place.

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​What's the difference in wearing comfort?

TOVE and HERMIA are two of the brand's most popular roomwear series. Although both are designed for year-round wear, their fabrics and wearing comfort have distinctly different characteristics. Here's a detailed comparison of the feel of each.

・As loungewear for relaxing around the house, for cozy weekend downtime, or for yoga and stretching.

・For long hours of sitting while working from home.

・As indoor wear on days when you're not feeling well, or in air-conditioned rooms.

・Plush and soft, with a moderate, medium-weight thickness and a smooth touch against the skin.

・Half brushed, keeping you warm in winter, so it can be worn year-round.

・It has plenty of stretch, springing back nicely.

・You won't feel any tightness around your joints, so there's zero stress in the wearing comfort—you can relax in any position.

※ Since it's a bit thick, we recommend wearing it with proper air conditioning during the summer.

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・As easy-to-move-in clothing for cooking, housework, or playing with kids.
・As compact, packable travel wear.
・As a everyday staple that holds its shape well.

・Even when you sweat, it keeps a dry, smooth feel against the skin—thin, light, and easy to wear.

・With its dry touch, it stays cool in summer, making it suitable for year-round wear.

・It has a slight amount of horizontal stretch, making it easy to move in.

・Its comfortable fit that doesn't restrict or cling to the body makes it feel especially pleasant on sweaty or humid days.

・It resists losing its shape and keeps a neat appearance, so it's recommended for travel or staying overnight as well.

※ Since it's thin, those who tend to feel cold may want to use heating or layer up in winter.

A balance of body and mind, achieved simply by wearing them. The TOVE and HERMIA series each have their own distinct characteristics, but both are designed with functionality that supports comfortable everyday living. Now that we're spending more time at home, why not choose the one that best matches your own way of spending that time?