Nike Air PrestoThe Nike Air Presto was originally released in 2000 and touted as the "t-shirt for your feet." The stretch-mesh featured on the upper contours to your feet unlike any other sneaker. Because of this unique material and design, many consider it the most comfortable shoe they have ever worn. Unlike conventional shoe sizing, the Air Presto's sizing structure is similar to a t-shirt. Please use these guidelines to find your size: Men's sizes XXXS (6-7), XXS (7-8), XS (8-9), S (9-10), M (10-11), L (11-12), XL (12-13), XXL (13-14). Women's sizes XXXS (5-6), XXS (6-7), XS (7-8), S (8-9), M (9-10), L (10-11), XL (11-12)