Refresole is an insole embedded with a copper plate in the toe area and a magnet in the arch area. The copper releases ions to eliminate odor-causing bacteria and reduce bad smell from shoes, while the magnetic sole can promote blood circulation to warm your cold feet, loosen up the stiff shoulders, reduce swollen feet and prevent fatigue. In addition, the use of a mesh material for the insole prevents stuffiness inside the shoes. Simply slip them into your existing shoes to promote good heath while keeping your feet dry in summer and warm in winter. Refresole is an approved medical device for its magnetic properties.