Polyvinyl Chloride sole. Referring to the shark prototype to create beautiful and comfortable shark shoes Comfortable and non-slip: PVC material, comfortable, soft and breathable. Whether it is for outdoor travel or home use, it can provide you with a comfortable wearing experience Lightweight and comfortable: lightweight shoe design, comfortable wearing experience Fun Slippers: Slippers are made of strong, lightweight, stretchy, and shockproof material. Note: The yardage is half a yard too small, it is recommended to take a bigger yard. Shoes may smell a little at first, please put them in a well-ventilated place for a while before wearing them. Color: Blue, Green, Gray, Black(optional) Suggested shoe size Acutal Inner length 36-37 Suitable for 35-36, Inner length 22.5cm 38-39 Suitable for 37-38, Inner length 23.5cm 40-41 Suitable for 39-40, Inner length 24.5cm 42-43 Suitable for 41-42, Inner length 25.5cm 44-45 Suitable for 43-44, Inner length 26.5cm Packing list: 1 pair of shark slippers