1. The inner side is covered with cloth material, which is soft and elastic, and fits the skin
2. Not easy to cause friction damage, non-slip and breathable
3. Thick outer hard board, strong plastic material
4. High-density material shaping, effectively reduce damage
5. Material: PVC, EVA
6. Length: S about 14cm, M about 16cm, L about 18cm
7. Description: only the insert, no socks