Surfers, check out these UPSURF thruster fins that are compatible with Future Fins systems! This M-size set features that perfect fiberglass and honeycomb construction that gives you both strength and flexibility in the water. With a 4.37-inch base and 4.55-inch depth, they're designed to work great in a wide range of conditions from beach breaks to point breaks. The lightweight design makes turning and maneuvering so much easier while you're riding waves. UPSURF has been in the surf industry for over 10 years, and their professional team has tested these fins thoroughly to ensure they can handle whatever you throw at them. The fiberglass reinforced nylon construction means these babies are built to last through plenty of sessions. Perfect for surfers who want reliable performance without breaking the bank. Whether you're a beginner looking to upgrade your stock fins or an experienced rider wanting to try something new, this 3-fin thruster set delivers that perfect balance of drive, hold, and maneuverability. Get ready to feel the difference on your next surf session!