The Magnetic Insole is both comfortable and (due to the large amount of magnets) very powerful.  There are ventilation holes within the insole to allow the foot adequate air circulation and aid comfort.

The Magnet Therapy Black Insole is extremely comfortable. When fitted in the shoe correctly it provides continuous Magnetic Therapy to the feet and ankles. The insole comes in two sizes.Insoles are very flexible and thin. They stimulates the soles of the feet to cause a massaging effect while wearing.