What does it mean when a description lists a wakeboard as a blem? Blem boards have minor cosmetic imperfections. A common example is a board with a slightly faded patch in the graphics. These flaws are often so minor that only a trained eye can tell the difference compared side by side to a non-blem. These boards come directly from the manufacturers with these small flaws. Blems in no way detract from the performance of the wakeboard. In fact these blems work in your favor because we mark them down and keep dollars in your pocket.