The latest design of the Mizuno crew sock is the Core with a padded heel and forefoot with a lateral knit. The vented forefoot allows air circulation to keep you comfortable during use. The socks feature the Mizuno Runbird® logo and the player number plate for personalization. The gripper top keeps your socks up even with vigorous play.Each pair has right–and left–specific fit for greater comfort and stability. Constructed with 68% polyester, 29% nylon, and 3% Spandex.