This demonstration video discusses and shows the features of XS Scuba´s Universal Spring Fin Straps. These spring fin straps automatically adjust to the divers feet. It features an unbreakable nylon-covered stainless steel strap provides amazing comfort. Comes with three styles of buckles included to fit most any type of adjustable strap fins. These spring straps also alsoits old style buckles, large post buckles (most of today´s modern fins), and small post buckles like Atomic fins. Comes in sizes Small (8"), Medium (10"), Large (12").