Introducing the "Chirimen Series": 100% Organic Cotton "Naturally Functional Innerwear" that Relies on Traditional Japanese Craftsmanship, Now Thinner and Lighter After Over a Decade of Support!

AVANTI Inc. (Headquarters: Shinjuku-ku, Tokyo; Representative: Hideko Okumori), which operates the sustainable lifestyle brand "PRISTINE" specializing in organic cotton, is launching the "Chirimen Inner Series," incorporating the wisdom born from Japan's climate for the increasingly hot Japanese summers.

This series has been a staple summer innerwear for PRISTINE since its launch in 2015, supported by many customers every year. Utilizing the traditional techniques of Takashima City in Shiga Prefecture, a renowned weaving region known for its lightweight fabrics like "Takashima Chijimi," the series creates fine wrinkles (shibo) on the fabric using highly twisted organic cotton yarn. This achieves exceptional breathability and a cool, dry feel. In an innerwear market where chemical processing and petroleum-derived materials are common, PRISTINE has consistently chosen options that are gentle on both bare skin and the environment since its inception. By leveraging the inherent healthiness of organic cotton—without adding or subtracting anything—and combining it with traditional Japanese craftsmanship, the brand continues to pursue "truly comfortable natural functionality" for a pleasant Japanese summer.

This season, in response to recent heatwaves and customer requests to "maintain and wear favorite items for a long time," the series has been further refined with thinner threads and enhanced comfort in fine details. It will be available in three styles: tank top, underdress, and pettipants.

Organic Cotton Chirimen Series Lineup / 2026 Update Points

Thinner Yarn, Stronger Twist for a Lighter Feel
By using finer original organic cotton yarn and increasing the twist rate, we have achieved an unprecedented airy lightness, along with a crisp, cool, and delicate texture. Despite being thin, the highly twisted yarn effectively absorbs sweat, and the fine wrinkles allow it to stay away from the skin, maintaining a comfortable bare skin feel.

Newly Added "Replaceable Elastic Band" for Long-Term Use
With the desire to "cherish and wear favorite innerwear for a long time through maintenance," we have newly added an opening for replacing the elastic waistband. Furthermore, the seam allowances of the pettipants, like the tank top and underdress, are sewn with a folded seam, resulting in a smoother inner feel and improved durability.

Excellent Quick-Drying Properties to Reduce Laundry Effort
The thinner yarn further enhances breathability, making the garments dry quickly even with daily washing. It has evolved to be more user-friendly as daily wear during sweaty seasons.

We propose this essential item, made from undyed organic cotton that retains the material's natural healthiness, to comfortably navigate Japan's extreme heat.

Chirimen Tank Top
¥13,200 (Tax Included)
https://pristine.jp/products/446031

Chirimen Underdress
¥19,800 (Tax Included)
https://pristine.jp/products/446032

Chirimen Pettipants
¥17,600 (Tax Included)
https://pristine.jp/products/446033

【Common Specifications】
Material: 100% Organic Cotton Size: M Color: Natural
Made in Japan Fabric: Shiga Prefecture / Sewing: Saitama Prefecture
https://www.pristine.jp/

PRISTINE, AVANTI's in-house brand debuted in 1996. With the concept "For a comfortable daily life, not too much effort, not cutting corners," we develop everything from yarn to finished products with our own planning and design, and produce them in Japan. We propose a sustainable organic lifestyle that fits into daily life. The materials used are organic cotton, which is comfortable for both skin and the environment, and natural materials that return to the earth. We utilize the healthy colors and textures of the materials themselves, create products without burdening the earth, and are made using traditional techniques passed down by Japanese artisans. In our manufacturing process, we are committed to ethical production methods that consider human rights and the environment, and we have also obtained CARE certification (third-party ESG certification).

Company Profile

Company Name: AVANTI Inc.
Representative: Hideko Okumori, President and CEO
Established: September 4, 1985
Location: Ninomiya Building 4F (Headquarters) / 1F (PRISTINE Main Store), 31 Daikyō-chō, Shinjuku-ku, Tokyo 160-0015
Phone Number: 03-3226-7789
URL: https://avantijapan.co.jp/

Business Activities

Import and sale of raw organic cotton
Planning, manufacturing, and sales of organic cotton products
Planning, manufacturing, and sales of yarn and fabric
Recycled cotton (Recotton) business
Domestic cotton business