When it comes to our magnetic stirrups system, there is nothing to worry about. The magnetic field created by our stirrups is not dangerous - neither you nor your horse will be affected in any way. Some people actually claim positive effects on blood flow. However, there is no scientific evidence supporting these claims and therefore the Federal Trade Commission (FTC) cracked down on a company for false marketing in 1999. (Here is the the case.)
Anyway, our magnetic safety stirrups and our magnetic insoles all come with a sophisticated magnetic configuration, which focuses the magnetic field to the area where it is need most - that is between the stirrup and the insole. At the same time, it shields your feet from the field and also decreases the magnetic field below the stirrup.
Note: If you have metal implants or a cardiac pacemaker (PM), please check this article.