Insoles Blue There are 8 magnets of different sizes on the magnetic insoles, which are massaged by applying the magnetic field to a specific reflex tension nerve in the foot.Stimulates rapid blood flow to both feet and relieves foot pain caused by long periods of movement.Orthopedic Function Our magnetic orthopedic insoles are designed with contour insoles that are better suited to the human foot type.Silicone material absorbs the impact and Universal size Our insoles are more in line with the size of the feet of the European population.Suitable for female and male sizes.29 cm can meet the needs of different sizes of feet.If the insoles are too big, they can be easily cut to size.Breathable PHS magnetic insoles is made of PVR silicone gel, in addition to a modern design, the insoles are very breathable and comfortable.Sweat and moisture on the feet are absorbed by the soles.Notes The magnetic insoles may cause some pain when used for the first time.This is because your feet haven't gotten used to it yet.You will only feel the full effect after several uses.Instructions for use: 1. Remove the current soles of your shoes.2. Place the new soles back to back with your current soles.3. If the magnetic insoles are too big, cut them to size. 4. Insert the new insoles into your shoes.