The K-Swiss SI-18 is a line of shoe which became popular among the parkour and free running communities in 2010. The shoe was originally discontinued in 2010, but due to popular demand will be brought back into production during 2011/2012.
Two versions of the shoe exist - the International, to return in January 2011, and the Rannell which is scheduled to appear in early 2012. The two versions of the shoes have a differing construction, with the Rannell being the most popular.
- "SI 18s Are Back - 3RUN Parkour & Freerunning Forums". 3run.co.uk. Retrieved 2011-01-20.
- "K-Swiss Si-18’s To Return | Urban Freeflow ® Official Parkour and Freerunning Site". urbanfreeflow.com. Retrieved 2011-01-20.