【Doyo no Ushi no Hi】Rediscovering Wool: An Ancient Yet Modern Material

July 19 is “Doyo no Ushi no Hi”, a traditional Japanese seasonal custom rooted in the wisdom of staying healthy through the summer. Just as people have long eaten nutritious eel to help get through the heat, our ancestors also knew how to choose and make use of materials suited to each season in their daily lives.

Today, we often turn to the latest high-tech fabrics. However, there is one material that perfectly embodies the idea of “learning from the past to create something new”: wool, a natural fiber loved by humankind since ancient times. Surprisingly, wool is a hidden gem that fits remarkably well with Japan’s modern summer climate.

So why does wool, often associated with winter, connect with the theme of “getting through summer” on Doyo no Ushi no Hi? Let’s explore its historical background and why wool is now being rediscovered as a smart choice for summer.

The Long History of Wool and Humankind: A Time-Tested Wisdom for Everyday Life

Wool is one of the oldest natural fibers used by humankind, dating back to the time when people lived by hunting and gathering. This fiber, naturally developed by sheep to survive harsh environments, has supported human life for centuries.

・Adaptability to harsh natural environments: Wool has properties that allow it to respond to extreme temperature changes, from desert heat to freezing cold. This is part of how sheep maintain a stable body temperature, and humans have long benefited from that same natural function.

・The wisdom of “eating” and “wearing”: Ancient people obtained nutrition from sheep as livestock while also using their wool and hides as clothing to protect themselves from severe climates. Just as eating eel on Doyo no Ushi no Hi is a traditional way to draw strength from nature, wearing wool was also a form of wisdom that made the most of nature’s blessings.

However, with the rise of synthetic fibers, wool gradually became associated with ideas such as “difficult to care for” and “only for winter,” causing it to be pushed slightly aside as an everyday material.

Why Is Wool Being Rediscovered as a Summer Material Today?

Thanks to modern technological innovation and changes in lifestyle, wool—especially merino wool—is once again gaining attention as a material that combines traditional wisdom with modern comfort, making it an essential choice for summer wear.

1. Rediscovering the Functionality Created by Nature

Contrary to the old image of wool, merino wool offers a well-balanced range of features that modern summer clothing requires. These are the natural functions that sheep have developed over time.

・Excellent moisture control: Even when you sweat in hot weather, merino wool quickly absorbs moisture from the skin in vapor form and releases it outward. This helps prevent stickiness and keeps the skin feeling dry and comfortable. This is one of the main reasons wool can feel cool even in Japan’s humid summer climate.

・Helps prevent post-sweat chills: Even after absorbing moisture, wool maintains an appropriate layer of air within the fibers. This helps prevent your body from cooling down too suddenly in air-conditioned rooms or when temperatures drop in the evening.

・Naturally clean and fresh: Wool has natural odor-resistant properties, helping reduce unpleasant smells caused by sweat and keeping you feeling fresh.

2. New Appeal Brought Out by Modern Technology

C-one’s merino wool has evolved through modern spinning and knitting technology, overturning the conventional image of wool by being “extra fine and non-itchy” as well as “machine washable at home.”

・Luxuriously soft texture: Because the fibers are extremely fine, they feel gentle against the skin without irritation. The result is a smooth, cashmere-like touch that feels comfortable even when worn directly on bare skin in summer.

・Easy for everyday use: The old image of wool being difficult to care for is no longer the case. Since it can be easily washed in a washing machine, you can wear it cleanly and comfortably every day, even during the sweaty summer season.

Spend Doyo no Ushi no Hi with Wool: An Ancient Yet Modern Material

Just as eating eel on Doyo no Ushi no Hi is believed to provide strength for getting through summer, wearing C-one’s 100% merino wool items can be seen as a new summer habit that protects our bodies through the wisdom of nature and modern technology.

In the pursuit of comfort, we have rediscovered the remarkable potential of wool, a material passed down from our distant ancestors.

This summer, add C-one’s 100% merino wool items to your wardrobe and experience the power of this ancient yet modern material for yourself. Enjoy a more comfortable, healthier summer every day.