The SereneLife Thunder Wave Water Sport Knee-Board is designed for single riders of all ages, offering a safe and stable platform for water adventures. With comfortable form-fitting knee slots and a lightweight design, this knee-board is perfect for lakes, rivers, and oceans. Its marine-grade water-resistant and corrosion-resistant construction ensures long-lasting durability. Ideal for beginners and experienced riders alike, the Thunder Wave knee-board promises fun and excitement on the water.