This might be an inflatable SUP but does not give in on stiffness and strength thanks to the double layered drop stitch material. The board consist of two layers of PVC. Those layers are glued together and the whole is held together by drop-stitch. The carbon enforced sidewall adds extra stiffness which benefits the sailing characteristics. In the center of the SUP, you find a mast plate. This allows the SUP to also work as a windsurf board. The multifunctional Challenger challenges you to go for an exciting windsurf ride, a relaxed SUP ride or a longer lasting tour. You won't get bored with this one!