The Tusa Imprex SF-7700 Black Open Heel Fins with Shape Keepers are high-quality snorkeling fins designed to be adjustable for users. Manufactured in Taiwan, these fins feature a unique shape-keeping design to enhance propulsion and efficiency while snorkeling. The Tusa brand is known for producing durable and reliable water sports equipment, making these fins a great option for scuba enthusiasts and snorkelers looking for a reliable and comfortable fin option.