magnetic ball for side sleep - calma plus, stop snore sleep aid for back snorers, anti snoring device for sleep apnea, comfortably attaches to any clothes and keeps you in a healthy sleeping position whole nights now upgraded with stronger magnets and varying stiffness! <br/> (clip the softer half on the inside of your shirt and the stiffer one on the outside)<br/><br/>how it works :<br/> whole nights shirt clip solution creates a firm bump on your back that makes you adjust your sleeping position to the side or stomach, which ensures your airway is not blocked. <br/><br/>comfortable and easy to use:<br/> it can be easily attached to any clothes. strong magnets with a non-slip layer make sure that the magnetic ball stays in place for the whole night. no need for special straps or belts.