ROTTERDAM Project is a charity program to support young talented runner to chase dreams in running world We are highly committed to quality; ROTTERDAM would be one of our exclusive masterpiece. Lightweight material, smooth hand feel, and using latest Easysunday Dri-Fit tech. Every piece is numbered and will get more Easysunday content. Limited to 52 pieces. This is our first step to share more miles ahead. With open hands, this program will integrate with other runners to make running ecosystem more sustainable, accessible, and enjoyable. We are proud to make “By Runners For Runners” into the real life.