50% More Magnets Than Most Other Boots! Magnetic Therapy is a proven effective way to speed healing by increasing blood flow, reducing inflammation and easing soreness. Magnetic products utilize Unipolar Neodymium Magnets with a GAUSS rating of 1100 (a low to medium depth penetration). Can be left on for up to 24 hours with supervision. Made with a 1000 denier polyester outer covering and poly-fleece lining with interior foam padding. Adjustable hook and loop fasteners to fit all sizes. Sold in pairs. Navy.