Extremely light women's slippers set on the platform are made of foam material. They have adjustable straps fastened with buckles. This model is classic slip-on. Slippers are also great as footwear for the pool. Be sure to also check out the other models of women's flip-flops! When choosing a size, please refer to the size chart. 36-22,5/37-23,5/38-24/39-24,5/40-25/41-25,5cm