Yonex 3D Ergo Socks are premium performance socks engineered for footwork-intensive sports like badminton and tennis. Featuring left/right-specific anatomical design based on human ergonomics—world’s first such dedicated sock construction—these socks provide enhanced fit, reduced slippage, and targeted cushioning in high-impact zones. The 3D立体形状 (3D立体 shape) ensures a snug, contoured fit that mimics natural foot movement, while the breathable cotton-blend fabric wicks moisture and maintains comfort during extended play. Ideal for competitive athletes and serious enthusiasts, they’re labeled 'For フットワーク' (For Footwork), emphasizing agility and precision. Packaged in clear retail sleeve with size S (22–24cm foot length), the white pair offers clean aesthetics and versatile pairing with athletic footwear. Durable ribbed cuffs prevent rolling, and reinforced heel/toe areas extend lifespan. Perfect for indoor court sports, training sessions, or daily active wear where foot support and blister prevention matter.