To use, first replace the existing insoles with the EVA Adult Flat Foot Arch Support. The front end can be trimmed for better fit. It is suitable for sports as it is sweat and odor resistant. It can also be fitted into most type of shoes comfortably.
NOTE: It comes in a pair (left and right) and 4 sizes, XS (EU:34-37), S (EU: 37-40), M(EU: 40-43) and L (EU: 43-47)