Comes with 1 pair of silicone fin keepers Handy way to keep secure and stay firmly in place when effect by the water acting force Pure silica gel, extremely soft, there will be nonallergenic reaction to the skin 3-Arm Y shaped strap design, high elasticity to fit over but enough staying power to keep your fin on Great accessory for diving, snorkeling, swimming, surfing or other water sports Specification: Material: Silica Gel Color: Black Size: S/M/L Size Chart: S (Dia.): Approx. 6 cm/2.36 inch M (Dia.): Approx. 7 cm/2.76 inch L (Dia.): Approx. 8 cm/3.15 inch Package Includes: 2 Pieces / Set Fin Keepers(4 Pack) Note: are not included. Due to the differences between different monitors, the picture may not reflect the actual color. There is 2-3% difference according to manual measurement, please check the size carefully before you buy the item.