Yonex 3D Ergo Socks are innovative performance socks engineered with human ergonomics for optimal foot support and comfort during intense athletic activity. Featuring left/right-specific design (左右専用) and 3D立体形状 (3D立体 shaping), they provide precise anatomical fit, reducing slippage and pressure points. Made from high-performance synthetic blend with targeted cushioning in heel and ball-of-foot zones, these socks enhance moisture-wicking, breathability, and durability—ideal for badminton, tennis, and other racquet sports. The packaging indicates size M (25–28 cm foot length) and specifies 'For フットワーク' (for footwork), highlighting their focus on agility and rapid directional changes. The sleek black color offers versatility and professional appearance, while the reinforced toe and arch support ensure long-term wear resistance. Perfect for competitive athletes seeking biomechanical advantage without compromising comfort.