Rubber soleMEMORY FOAM : You’ll feel like walking on soft pillows. These house slippers have a memory foam cushion that will keep your feet cozy. The flexible, and high-density memory foam insole reduces your fatigue.WATERPROOF : The anti-slip and sturdy enough TPR sole ensures perfect for both at home after a nice bath or outside for quick errands.The waterproof hard rubber sole is a great choice for indoor and outdoor use.GREAT CHOICE : These slippers are skin friendly and keep your feet cool and fresh by staying sweatless and odor-free in spring and summer,with three beautiful color Soft pink, quiet gray, elegant blue.anti-slip style with an open-toe design helps your tired feet breath.MACHINE WASHABLE: Avoid long time soaking and scrubbing.The slippers are wearable and machine washable. Just throw them into the washing machine and they will be clean as new.STYLES OPTIONS: Available in your choice of slippers!We also have the similar style kawaii slippers in our store. Just click our brand name or directly search ‘www.amazon.com/caramellabubble’ to find your favorite items.