Abstract: The present invention is a Low-Drag Fin and Foil System for Surfboards (10), particularly including cambered fin foils (40; 42). The invention (10) also discloses low-drag, directionally unstable fin positions wherein the lesser of negative angle of attack of a trailing fin (50), versus the higher or positive angle of attack of a forward fin (48), makes the board (12) highly maneuverable by creating a yawing moment that aids the rotation of the board (12) as it is turned. The system particularly utilizes fins (40) having foil (42) shapes in which either the cambered side (74) or the non-cambered side (76) is provided with a combination of a convex curvature (68) and a concave curvature (70) to result in an oscillating curvature (72) which has a positive effect on control and acceleration.

Abstract: A kickboard has a non-planar shape and comprises a primary panel with opposite support members laterally outside from the primary panel with a transitional section therebetween. The support members are at a rear longitudinal position and additional support shoulders may extend from a forward end of the primary panel along each lateral side to a respective support member. The rearward end defines an opening with a cavity formed between the primary panel, transitional sections, support shoulders and support members. In use, the kickboard provides substantially improved ergonomics and allows a swimmer to support her elbows on the support members with a portion of her forearms on the support shoulders, with arms in a bent position below the surface of the water. The configuration improves comfort while maintaining a favorable hydrodynamic swimming position and reducing shoulder stress.