Magnets are positioned in these lambskins boots between the lambskin with a depth of pile of approx. 20mm and the hard-wearing quilted fabric. They have a beneficial effect on blood circulation and can help to relieve pains in the joints. Velcro fasteners make the boots easy to put on. The aticle is machine washable with a special lambskin detergent and you can use a tumble tyer. As washing detergend we recommend our product "C 7". Please consider our care references at the product.