ADJUSTABLE STRAPS AND BUCKLESOpen heel design and adjustable straps make the swim fins suitable for different foot types and sizes, perfect to share with your friends and family, in addition it will let small pebbles and debris fall. The important part is the quick release buckle that keeps strap's length of the you have set, so you don't need to adjust the straps for every use, easy donning and doffing. PERFECT SWIM PARTNERGREATEVER Snorkel 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). RELIABLE MATERIALThe foot pocket with TPR material+Buckle with PC+ blade with PP. That's anti-deformation, lightweight, corrosion resistant and durability. Sturdy and maintains flexibility. So it can fully achieve the comfort level of barefoot wear and don't worry about rubbing feet. Non-slip shadow design on the bottom, safe to use. TRAVEL-FRIENDLYGREATEVER pays attention to every detail, we provide the quick-dry mesh bag and hard plastic inserts for the swim flippers, mesh bag can quickly filter sand and water, it and the short swim fins are perfect match for travel and carrying. The hard plastic can keep fins in shape when store it. AFTER SALES SERVICEAs long as you are our customers,since the day you buy snorkel fins. We will provide 24-hour uninterrupted service.We sincerelly believe we will bring the customers the most satisfied buying experience.