The Under Armour Youth Soccer Over-The-Calf (OTC) Socks in size 13.5K-4.5 are designed to enhance young athletes' performance and comfort on the field. Medium Cushioning: Provides comfort and protection throughout the foot during play. Unique Ankle Design: Offers targeted support and comfort where it's needed most. Mesh Panels: Located on the top of the foot and calf to enhance breathability, keeping feet cool and dry. Durable, Moisture-Wicking Material: Effectively wicks sweat and dries quickly to maintain comfort. Embedded Arch Support: Helps reduce foot fatigue, allowing for longer periods of play. Fitted Heel: Contours around the foot for a better fit and added comfort. Fold-Down Cuff: Adds versatility and style to the sock's design. Left/Right Specific Fit: Ensures an ergonomic fit tailored to each foot. These socks are primarily composed of 52% Nylon, 45% Polyester, and 3% Elastane, offering a balance of durability, stretch, and comfort.