2XU Socks Size Chart The 2XU Compression Run Socks are great for running, triathlon and fitness training. Seamless, gradient zoned compression panels offer increased blood flow and maximum muscle containment for increased performance and enhanced recovery times. The zoned breathability panels enable maximum airflow for dryness and comfort, while a linked toe cage provides extra padding for your toes. Features: - PWX compression fabric with enhanced power to support the shin, calf, ankle, - Achilles and arch of the foot. - Graduated fit to promote circulation for muscle performance and faster recovery. - Linked toe cage and light padding for added comfort. - Seamless construction for greater comfort. - High filament yarns for dryness - wicks sweat from the skin to the fabric exterior. - Antibacterial and UPF50+ sun protection.