The parabolic Razorback kneeboard from Hydroslide has it all! The board features a 3" padded shock strap, thin profile design, shift-on-the-fly retractable fins, deep padded knee wells, and the patented Hydro hook. Whether you have the fins down for slalom-like control or up for surface 360s, this kneeboard provides an exciting ride. Hydro hook pops up when in use and then automatically retracts to avoid cuts and bruises. Made in the USA.