Adults Snorkel Fins Adjustable Buckles Open Heel Swim FlippersPERFECT SWIM PARTNERSnorkel Fins with scientific design, minimize fatigue and prevent cramps, it uses the unique open toe and cool flame shaped mesh instep design, it will help to reduce resistance and you will feel more comfortable and breathable. It's can be used with water shoes and water socks (Reminder: Please purchase sizes up if wear with dive booties together). DJUSTABLE STRAPS AND BUCKLESOpen heel design and adjustable straps make the swim