1. Basic material: EVA foam, PE foam, rubber foam, PU foam.
2. Top cover: Velet, cambrelle, visa, mesh, leather.
3. Optional plug: TPR pad, poron pad for shock absorption.
4. Optional poliyou layer for anti-bacteria and odor free.
Velcro Elastic Insole:
1. Top layer: Elastic velcro.
2. Bottom layer: EVA foam.
3. Any color for choice.