Allbirds' newest item is comfortable underwear! It will be available in the online store first.

Known as a sustainable footwear brandAllbirdsThe brand is known as "the world's most comfortable shoes. The new items to be released on June 18 (Thu.) are underwear.

The "Trino Undies" underwear line utilizes the technology and knowledge cultivated in the development of shoes to bring out the comfort that can only be achieved with natural materials.

The fabric is a blend of eucalyptus tree fibers and merino wool, a well-known material for "Allbirds" shoes, for a soft and smooth feel. The combination of silky, airy eucalyptus fibers and merino wool, which excels in regulating temperature and humidity, makes the garment comfortable even in Japan's climate, where the four seasons are distinctly different.

The waistband is made of recyclable castor oil, which is another example of "Allbirds'" commitment to sustainability.

Of course, like the shoes, it will be available for both men and women. Let's take a look at the designs that will be released.

Boxer Brief (Men's) available in Storm, Malibu, Raincloud, Boulder ¥3,200 in TAX

Bralette Available in Wheat, Nimbus, Boulder ¥3,900 in TAX

Brief Available in Storm, Raincloud and Nimbus ¥2,300 in TAX

Thong Color range: Storm, Aloe, Wheat, Malibu, Raincloud, Nimbus, Boulder ¥1,900 in TAX

Shortie Colors available: Storm, Aloe, Wheat, Malibu, Raincloud ¥2,600 in TAX

The first underwear lineup features clean and minimalist designs typical of . The men's lineup includes a pair of boxer shorts, and the women's lineup includes a no-pad bra and three types of shorts. As with the shoes, the comfort of the undergarments is appealing because they do not constrict the body.

Sizes range from S to XL for men and XS to L for women, to accommodate a wide range of body types. Sales will begin first at the online store on Thursday, June 18, with the directly managed Harajuku store scheduled to launch in mid-July.

This is good news for those who have been wanting simple, comfortable undergarments and are concerned about environmental issues. Like the shoes, it is likely to become popular quickly, so we recommend getting it before it is out of stock.