The Ronix Kids' Bottom-Mount Fins are smaller in stature, but perfect in performance for the next generation of surfers. Designed specifically for the Ronix Super Sonic Space Odyssey Kids Series, these fins can easily be adjusted with an allen wrench. A fiberglass layup offers a more affordable value and forgiving ride than the carbon epoxy alternative. Easily adjusted with an allen wrench Fiberglass layup for a more forgiving ride | Kids' Fiberglass Bottom-Mount 1.5" Fins