My friend sold those matresses and other magnetic device at "parties" just like Tupperware is sold. We could try out magnets to put in our shoes, flat magnets to attach to your back or wherever the pain was. Also massage- (of the neck and back!) magnets. All the others claimed to feel the effect and was so excited about it and "shopped away". I was sitting all puzzled and didn´t join the excitement. That made my friend lend us one of the matresses to get more time to feel the effects of it. But nah....no effects was detected.
