Pace and precision.The Regulation Mesh Crew is built with an open, breathable knit that stays light on the feet. A premium Italian yarn with a smooth hand and subtle luster elevates this traditionally athletic style. When the pace picks up, a tight rib with official stripes at the welt and compression band at the foot ensure comfort and durability.Size Guide:Medium (M): Women's US Size 6 - 10Large (L): Men's US Size 7 - 12