Magnetic pad rests comfortably and strategically over the shoulders where most needed. Fifteen dome-shaped 0.1" x 0.7" dia, 1,000 gauss magnets are positioned at key shoulder and upper back points. All bionorth (-) facing the body. This unique 3"-4" wide U-shaped cotton/poly design with holding strap (goes across the chest). Spans 11" at the top and 19" on the bottom.
more info