Adjustable Open Heel Design, Good for Sharing: The open-heel design means each fin can accommodate a wider range of sizes, so family members or friends can share equipment more easily. The best parts is the filter pads inside the fins can keep fins in shape when store it.Wears Comfortably:Support Various Way to Put OnCarefully select high quality material, soft foot pocket, flexibleenough for barefoot, but can also be worn with fin socks or dive bootieswhich help to protect a diver& 39;s feet from the cold, and blisters.(Reminder: Please purchase sizes up if wear with dive booties together)Product Material: PP+TPR+Silicone+Tempered glassApplicable people: unisexPacking: PE plastic bagMirror: tempered glassFin material: PP+TPRSilicone: imported liquid silicone"