The Si-18 Rannell has reclaimed heritage in the early 2000s from the archives of K-Swiss. Originally a cross training shoe with the design element of the Si-18 tennis shoes, the Si-18 Rannell was used in the silhouette of the free running and parkour community. K-Swiss signature D-ring and molded TPU eyelets keep fit secure and monofilament mesh quarter panels provide breathability The Si-18 Rannell is above the EVA midsole with cushioned Si-18 TPU gel inserts on the sides.