This factor is first priority with us. You should be aware, however, that if you are pregnant or are using a pacemaker or any medical electric device, you should not wear magnets.
Most suppliers are reluctant to divulge gauss ratings.
A single MantraMag band contains 5 ultra-high strength neodymium magnets, each rated at 2,400 gauss. These magnets are shirt button size, yet pack more power than cheaper magnets many times larger. The MantraMag magnetic band is the only band on the market that soothes your skin with a warm, flexible, velvety soft brushed cotton interior. MantraMag is Velcro fastened, infinitely adjustable, any number can be connected to form any length. It looks and feels like a sweatband.