Purchase notice ️ This very low-cost product recently appeared on the market, and their materials are different from ours. Our products use environmentally friendly EVA materials. ️ Cheap products are made of PVC material, which will smell after a long time. Environmentally friendly EVA material can be used for a long time, lightweight and will not harm your feet. ️ The price determines the quality. We never sell fake and inferior products. Function: shock absorption, non-slip, wear-resistant, waterproof, breathable, sweat-proof, quick-drying, support, balance, shock resistance, light weight, warmth, and wrapping. Closed type: buckle Shoe size: M4-w6 = 36-37=22.5cm M5-w7 = 37-38=23.5cm M6-w8 = 38-39=24.5cm M7-w9 = 39-40=25.5cm M8-w10 = 41-42=26.5cm M9-w11 = 42-43=27.5cm M10-w12 = 43-44=28.5cm M11 = 44-45 Outer material: crostile resin Upper: Cross Flower Resin