Prevents fin deformation: This shoe tree is specially designed to maintain the shape of your diving fins and prevent them from deforming during storage or transportation. By inserting the shoe tree, you ensure that your fins retain their original shape, which is crucial for optimal performance in the water. This helps avoid creases, bends, or collapses that could negatively impact your swimming efficiency and overall diving experience. Regular use extends the life of your fins. Supports and expands: The 010 diving shoe tree not only prevents deformation but also provides support and expansion to maintain the ideal shape of your fins. This is especially useful for fins that tend to collapse or lose their shape over time. The shoe tree gently stretches the fin material, ensuring a snug and comfortable fit when you're ready to dive. This support helps to maintain the structural integrity of the fin, improving its response and power in the water. Hollow Design: With a hollow design, this shoe tree promotes air circulation inside the fin, preventing moisture build-up and reducing the risk of unpleasant odors. The hollow structure also minimizes weight, making it easy to carry and store. This design ensures that your fins stay dry and fresh, ready for your next dive. The ventilation also helps prevent the growth of mold or mildew, further extending the life of your dive fens and keeping them in top condition. Specifications: Color: Black Size: Length: 23.7 cm, Width: 19.7 cm, Height: 0.2cm Material: TPE Package includes: Shoe tree for diving fens x 1 pair