The SL collection by R-class was created the same time with the JW one, to complete the range with some more high-profile shoes made with the traditionally pleated (hand stitched and glued) technology. All the SL models are pre-arched.
They can be manufactured with a U-cut with drawstring or a V-cut, no drawstring. There is also a choice of three vamp heights (V1, V2, V3), where the V2 is the default “medium” one. The shanks vary from Soft to Hard and from FS(flexible Soft) to FH (Flexible Hard) which are more plible due to a special construction of the shanks.