The HydroSlide Razorback Kneeboard has it all! 3" padded Shock strap, patented thin-profile design, shift on the fly retractable fins, deep padded kneewells, and the Patent Pending Hydrohook. Whether you have the fins down for slalom like control, or the fins up for surface 360's, this board does it all. The Hydrohook pops up when in use, and then automatically retracts so there is nothing to bang, bruise, or cut yourself on. Made in USA.