The Serenity 2000 Magnetic Insoles are constructed with a patented magnetic polarization pattern, This deep penetrating pattern ensures the magnetic stimulation of all the reflexology points of the feet, Helps to relieve discomforts in the feet and legs, energizes & strengthens the whole body, Highly recommended for the itching and/or burning caused by neuropothy, To clean brush with warm soapy water, rinse and air dry, Large fits up to men"s size 13, Small fits up to women"s size 9 1/2, Easily cuts to size using template provided, SKU: SEREN101