1. Material: sponge/cloth/rubber 2. Features: delicate touch, can be washed repeatedly 3. Curved design, very ergonomic, fit the toes as much as possible 4. The round plug can be cut and changed along the edge 5. Removable and adjustable shoe space 6. Dimensions: about 7.2cm in length, 3.5 cm in width and 1.6 cm in thickness 7. Weight: about 30g
