Description: Material: Made of high quality PETG material, it provides a comfortable environment for your feet. Comfortable and Breathable: Designed with open toe, water flows out quickly and you comfortable and breathable. Features: Heat insulation, with diversion ditch, drainage hole design, reduce drag drainage to improve swimming speed, Gifts for adults, and children. Wears Comfortably: Perfect amount of flexibility and antislip soles provide comfort around the foot. Applications: Great for scuba diving, snorkeling, or swimming. Specification: Material: PETG Color: Blue Black Size Chart: S:36-37, Outer Length 48.8cm/19.21inch, Inner Length 22.8cm/8.98inch, Width 19.5cm/7.68inch,Palm Long 26cm/10.24inch M: 38-39,Outer Length 50.8cm/20.00inch, Inner Length 23.8cm/9.37inch, Width 20cm/7.87inch, Palm Long 27cm/10.63inch ML: 40-41,Outer Length 53.3cm/20.98inch, Inner Length 25cm/9.84inch, Width 21cm/8.27inch, Palm Long 28.3cm/11.14inch L: 42-43,Outer Length 55.5cm/21.85inch, Inner Length 26cm/10.24inch, Width 22cm/8.66inch, Palm Long 29.4cm/11.57inch Package Includes: 2 Flippers Note: Please allow slightly errors due to manual measurement and different monitors.