Size for Travellingdiving fins short fin is an excellent choice for avid travelers as the short blade is lightweight and compact,making it ideal for packing with ease.Sturdy Flexible SoleThe entire sole is hard and comes with large non-slip inserts,both for total protection of the foot and for excellent transmission of the leg-fin effort.Humanize Blade DesignThe design of blade is base on thousands of data and test,all these are help diver swim in the water by using minimal effort but realize maximum efficiency.Adjustable Open heelThe open-heel design means each fin can accommodate a wider range of sizes,so family members or friends can share equipment more easily.Easy to Put Fins OnTo try it on, you have to put your feet into the fin pockets first,then pull back the strap and it will seal your feet tightly in the right position.Easy to Adjust Size Up or DownUse your finger to lightly pull open the buckle a little, and meanwhile pull back the strap by your other hand. By this way,the fins will hold your feet nice and secure no matter what foot sizes you are.Support Various Way to Put Onwater socks, water shoes are all available to wear with diving fins.Even with bare foot,it will never cause a bliatered heel as the fin pocket and strap are all made of super soft and comfortable silicone material.Our products have perfect after-sales service guarantee. You can buy swim fins without worries,if you have any problems,please feel free to contact us.