Regular size fits 30" - 37.5 " chest * Reg12 strategically placed magnets aligned down the center spine and across the lumbar region. * Support straps around the front shoulders to pull them gently back for correct posture. * Comfortable and light to wear underneath clothes. * Regular size fits 30" - 37.5 " chest Instructions 1. Pull shoulder straps over shoulders making sure that fabric pouches with magnets are closest to your body 2. Stretch waist belt around torso and fasten. 3. Adjust position and snugness as needed. Shoulder straps should pull back slightly on shoulder area. If needed pull waist belt down slightly to increase shoulder pressure. 4. Wash by hand in gentle detergent. Air dry Caution: Those having spine or back problem should consult their phsican before using this product.