Magnetic therapy makes miracles, really :) You have visible results after one session of wearing by horse a blanket + boots for 45 minutes, after training or whenever. Horse is relaxed and more happy. Magnets are extremely helpful for better blood circulation, muscles, joints and other tissue, (boots are even good for hoves!) And it is completely safe - of course, used wisely ;)
I can totally recommend you Torpol (torpol.eu) - this is a polish brand but they work worldwide and their products are highest quality in good prices :) for magnetic therapy they have blankets, boots and saddle pads for daily use.
I also saw a Veredus magnetic rug “at work” and it had same effect - so I can recommend it too.
A little bit long but I hope I was helpful :)
I have a perfessional choice magnetic blanket and it works great! On the pricey side but works so good!!