The most simplistic easy to use tool-less fin system created by our friends at Fin-S. A center spring load so you can put the fin on flat without having to apply added pressure to the front or back of a fin like most other fin setups. Combined with a lightweight strong fiberglass epoxy constructed fin for added drive and the least in friction with the water. A similar rake, and outline as the floating version. Function and affordability in this classic surf fin. Smaller in stature, but perfect in performance for the next generation of surfers. Designed specifically for our Super Sonic Space Odyssey Kids serie. These fins can easily be adjusted with an Allen wrench.