K-3B

A sports-oriented functional line derived from K-3B, it debuted in spring 2022. While the standard K-3B range focuses on coordinating sets, businesswear, and everyday clothing, this line offers athletic wear for a wide range of activities, including gym workouts, running, golf, soccer, and tennis. Its use of highly stretchable materials and emphasis on designs that do not restrict movement are defining features. The line extends K-3B’s functional materials and rationality into sports.

Developed as a women’s line of K-3B, it is presented on the official website as a standalone “WOMENS line.” It extends K-3B’s functional materials, coordinated sets, and rational design philosophy, which initially centered on menswear, to women’s silhouettes and items, while emphasizing athleisure elements that connect sports and everyday life. Whereas K-3B ZERO serves sports use and K-3B EXECUTIVE serves official business use, this line is positioned to cover women’s everyday life and active settings.

A new line for formal business wear launched by K-3B, it extends the parent brand’s casual businesswear offering into more traditional suits and tailoring. Centered on items such as coordinated sets, tailored jackets, dress pants, and coats, it uses materials and construction suited to formal business settings. Unlike the sports line K-3B ZERO and the women’s line K-3B WOMEN, it is positioned as a premium functional clothing line for those at the forefront of business.