Even the universities disagree on what Carolina or Columbia blue is. So we call this light blue with white stripes and no matter what it is an attractive color for your team. They are made from 100% nylon to make them stretchy and durable. They also have a reinforced arch and ankle support. Proudly made in the USA. Choose fromMEDIUM (fits ladies' shoe sizes 5 to 10 and men's 4.5 to 8.5) or LARGE (fits men's size 9-12 or ladies 11-12).