1. Material: TPR2. Size: M is suitable for size 35-39, L is suitable for size 39-443. Net weight: M (pair) 72G, L (pair) 80G4. U-shaped 4D wrap fits the heel to enhance stability5. Multi-directional balance of the soles of the feet and calf pressure6. 10 honeycomb non-slip holes, don’t move7. TPR tough material, not easy to deform when folded, wear-resistant8. Corrective insoles for X/O legs and flat feet

http://olla.gr/flat-foot-orthopedic-insole-arch-collapse-support-pad-adult-and-child-foot-valgus-orthosis-l-white/