Royal Racing Merino Crew Socks 32% Merino Wool, 32% Acrylic, 7% Polyester, 26% Nylon, 3% Lycra Imported Premium merino wool - natures finest 150mm rise to encompass ankle and lower calf Strategically placed cushioning on ankle bone Flat stitched seamless toe Asymmetrical left foot/right foot padding Premium merino wool - nature's finest with a 150mm rise to encompass ankle and lower calf Strategically placed cushioning on ankle bone with incorporated ankle and arch stabilizers Cool mesh zone Flexible mesh foot break for comfort Asymmetrical left foot/right foot padding