"Stripped down" version of the R5 oriented towards watercooling.
http://www.fractal-design.com/home/product/cases/define-series/define-s
http://www.fractal-design.com/home/product/cases/define-series/define-s-window
https://www.youtube.com/watch?v=FtaB29ulk_A
http://www.fractal-design.com/home/product/cases/define-series/define-s
http://www.fractal-design.com/home/product/cases/define-series/define-s-window
https://www.youtube.com/watch?v=FtaB29ulk_A