This Magnetic Bracelet is ideal if you suffer from Sciatica, Arthritis, Rheumatoid Arthritis etc. The Magnetic Bracelet is made from Polypropylene Material which is Strong but Light & Comfortable & ONE SIZE FITS ALL due to its adjustable strap. The Magnetic Bracelet is fitted with one STRONG 2000 Gauss Rare Earth Magnet. These magnets usually last a lifetime although there may be wear & tear with time with the Strap. The penetration of this magnet is one of the strongest on the market & we continue to get great results with this particular typeof Magnetic Bracelet.