Channel Islands M-23 Mid-Length Surfboard The M23 comes from the storied M13 bloodlines, a favorite hybrid board Al Merrick made for himself and rode variants of for decades from fun Rincon to maxing Sunset. A true high performance hybrid that caters to the widest possible type and size of surfer - and for the widest range of wave conditions. Not to be confused with the CI Mid, the M23 carries more foam, boasting a fuller rail and sleeker nose outline. It paddles like a champ while still riding more like a shortboard.