PREMIUM PERFORMANCE KITEBOARD FIN – DESIGNED & MANUFACTURED IN AUSTRIA Powerful take-offs. Maximum control. Expanded wind window! Our patented PORTAL Fin was created for riders who want more. Whether you want effortless upwind performance, toeside control, or massive jumps – the PORTAL FIN gives you full control and helps you get the most out of every session. The unique hollow-profile (BoxWing) optimizes water flow and delivers exceptional grip, stability, and upwind performance. Jump higher, hold your edge harder, and land with full control – the PORTAL Fin elevates every element of your session to the next level like never before. One set includes 4 fins, 4 top mounts, 4 spacers, and 8 screws (F-ONE adapter optional). KEY FEATURES Improved Grip & Control: Holds a stronger edge to handle high pressure – enabling powerful, vertical take-offs and smooth, controlled landings. Upwind Performance: Generates additional line tension and lift for better angles upwind and a wider wind window. Light Wind: Earlier planing through flat riding supported by the “Turbojet” Venturi effect. Chop Absorption: Smooths out your board in turbulent water so you maintain full control even at high speeds. Landing Stability: The unique BoxWing geometry prevents flow separation and offers safety even during critical landings and off-balance impacts. Innovative Topmount: The sleek topmount system ensures a clean look and additional deck grip during board-offs. Durable, Lightweight & Recyclable: 42 g per fin, made from robust Swiss TR90 UV polyamide and corrosion-resistant A4 stainless-steel hardware, fully recyclable. DISCIPLINE Ideal for freeride, big air, and performance riding. Enhances upwind ability, increases grip and stability, and absorbs chop for maximum riding pleasure. COMPATIBILITY Designed to fit the vast majority of all twintips – supports M5, M6, and F-ONE standard screw patterns. Known incompatibilities: Naish Monarch 2024, Future F14, Shinn ADHD 2021 HARDWARE All components are made from corrosion-resistant A4 marine-grade stainless steel, including screws and nuts, ensuring long-term durability and reliability in salty environments. MOUNTING SYSTEM Bottom-up mounting system with internal threads and innovative TopMount – ensures a clean deck appearance, eliminates thread-dependent drag, and offers extra grip for board-offs. Note: Installation requires a standard Phillips screwdriver. INNOVATION STATUS The BoxWing geometry is already used successfully in aviation and motorsport (MotoGP). This is the first application specifically developed and patented for kiteboard fins – unlocking its full potential on the water.