- Design: SMFK's sports collection, launched in 2026, naturally balances premium sports fabrics, designed for everyday multi-sport use, featuring slim and fitted silhouettes. The Natural Balance X-Circuit Sports Tank Top draws inspiration from ancient Chinese and Western Region attire, combining it with a modern sports vest, with the neckline crossing to form an X-shaped shoulder strap. An embroidered cross logo adorns the center of the neckline.