The 2XU 24/7 Compression socks were built to improve blood circulation for fresher feet and legs. Crew-length socks feature zoned padding at heels and balls of feet for added cushioning. Graduated compression increases blood flow and minimizes lactic acid buildup resulting in reduced muscle swelling, faster repair, and diminished soreness. Moisture-wicking fabric draws perspiration away from the body and towards the surface where it can evaporate. UPF 50+ fabrication protects skin by blocking harmful Ultraviolet A B rays (UVA/UVB). Flatlock seams reduce chafing and increase comfort. Seamless linked toe cage. MD-1/MD-2 and LG-1/LG-2 vary in calf size. Please refer to the size chart for detailed information. 78 percent nylon, 13 percent cotton, 9 percent Lycra. Machine wash, tumble dry. Imported.