Boston Red Sox 47 Socks - Brink - Low Cut 3 Pack. This is for a 3 pack of socks, all different colors. The '47 Brink Low Cut has mesh vent zones for breathability, footbed cushioning and arch support. Made with 100% polyester fibers to keep feet dry. Medium: Men's shoe size 5-8.5 Women's shoe size 5-9.5 Large: Men's shoe size 9-13 Women's shoe size 10-12