Magnetic Orthotics - Size: XL (Shoes Size W 11-12; M 10-11) BIOflex Magnetic Orthotics reduce the pressure on corns and calluses and relieve leg fatigue and back pain by supporting your foots natural structure. These come in active and dress styles. Magnetic Foot Care - BIOflex foot products allow for increased blood circulation, providing pain relief, acceleration of the healing process and relief of pain and numbness. Sizes: Women 5-12 and Men 6-13 Magnetic Fields: 2 in each foot Gauss: 500 per magnet