Stan Smith was one of the most popular sneakers in 2014. After many premium versions released last year, adidas Originals collaborates once again with the Belgian designer Raf Simons for a new collection for Spring 2015. Llike the previous Fall/Winter 2014 collection, this one features four new monochrome colors: gray, pale pink, pale blue and red. Each features perforated letter ‘R’ in place of the traditional Three Stripes and a Raf Simons stamped on the heel. The Raf Simons x adidas Originals Stan Smith Spring 2015 collection will be available from March 31.