- Size: One size • Breathability and comfort: our magnetic insoles are made of EVA material, providing good breathability and comfort. • High quality: they feature 18 high-quality magnets that massage the feet and stimulate reflex points, emitting magnetic waves that weaken fat cells. • Adjustable size: they can be cut to fit any foot size. • Removable while walking: designed to relax muscles, improve blood circulation, and relieve back pain. • Wide range of uses: suitable for almost all types of footwear, such as running shoes, work shoes, training shoes, street shoes, casual shoes, etc.