The second layer, made of breathable latex foam, improves the air circulation and provides shock-absorbing properties.
Place the half-insole in the front inside part the shoe, in the area of the metatarsals with leather layer in contact with the sole of the foot.
If you prefer a different option of leathers and/or backings, just choose from the list above and write it down.
The resulting reference will be, for example:
REF: 306 – LEATHER: engraved Arab fauve with shine – BACKING: smooth latex—-> REF 306/2B