Is traditional technology the most friendly to the earth? Allbirds introduces a limited quantity of shoes made with natural indigo.

The more earth-friendly brands are beginning to realize that traditional Japanese techniques and sustainability go hand in hand. Allbirds" is one such brand.

This is because the bright blue shoes to be released this time use natural indigo from Tokushima, which has been passed down since the Edo period (1603-1868).

Wool Runner - Watanabe's Japanese Indigo ¥20,000

This time, the base is the "Wool Runner", a masterpiece of "Allbirds". These shoes are made of top-quality ZQ merino, which is environmentally, animal, and quality-conscious, and they are a shoe that sets itself apart from others in terms of comfort.

The materials used are thoroughly sustainable, with sugarcane for the soles and castor oil for the insoles.

Wool Runner" is made with a tremendous amount of time and effort, but Watanabeʼs natural indigo is no less impressive. Dye master Kenta Watanabe starts from sowing the seeds of the raw material, Tadeai (dye made from water pepper).

The harvested Tate indigo is chopped, dried, and fermented to make dye dye dye, dye dye dye (sukumo), which is then kneaded with wood ash, shellfish ash, and fu (bran), and fermented to finally produce the dye solution.

The merino wool is slowly submerged in the carefully extracted liquid, then drained, then submerged, then drained... .

After an endless journey, they finally met and "Wool Runner - Watanabeʼs Japanese Indigo" was completed.

The deep indigo color blends well with the clean, unadorned body, and the more it is used, the more it refines into a vibrant color.

The carbon footprint of the shoe is 9.9, and like the previous Wool Runner, it is steadily moving toward zero greenhouse gas emissions.

Considering the history leading up to the tradition, the thoughtful consideration of the environment, and each of the steps involved in getting there, isn't 20,000 yen a little too reasonable?

. It will be on sale for a little while longer, on Friday, September 17. . It will be available in limited quantities at Allbirds Harajuku and Allbirds Marunouchi stores.

Think about the future of the earth with a pair of these finished products that ooze sincerity.