Crafted from lightweight, durable, corrosion resistant materials for use in humid environments and easy storage. Ideal for divers, professional divers, water sport athletes, and anyone who wants to keep their fins in condition. The fin shoe stretchers adjust the interior space of diving fins, designed to extend the lifespan of your equipment and fit a wide range of foot sizes. Use for drying fins after diving, storing during travel, daily maintenance, and organizing gear in cabinets; easy to insert into and remove from fins. Key attributes Function: adjusts fin interior space to fit multiple foot sizes and protect fin shape Compatibility: suitable for a variety of diving fin models and sizes Size: adjustable interior space to accommodate different footwear dimensions Material: lightweight, durable, corrosion resistant Performance: supports drying, storage, and ongoing maintenance to extend fin lifespan Use scenarios After a humid dive, place the stretcher inside the fin to aid drying and help maintain shape between uses. While traveling, insert into fins to compress and organize gear for compact packing and protection in luggage. Regular at home or gym maintenance, use to adapt fins for different users or seasons, helping extend the overall lifespan of the fins.