Synthetic sole, Vamp simple lines bump design, Japanese sub-grid, simple life. Inside the bottom of the streamlined design, to be close to the skin of the feet, effectively reduce the pressure on the soles, wearing more relaxed and comfortable. The material itself has a certain skid resistance, the design of the bump textures, texture soles increase friction with the floor, non-slip effect. Function: Non-slip,Quick drainage, Quick drying/Popular. Simple, low-heeled. Casual style perfect for Indoor bedroom, Bathroom, Living room, Swimming pool, Beach, public showers, steam room, dorms, , locker room, Spa, Gym. Each case comes with 2 of each size: US Women Size 6 to 10