(No box, almost unused. With cover) Loosen your shoulder blades for refreshed shoulders! Supervised by a shoulder blade specialist chiropractor. Replicates the techniques of a chiropractor, It sways and applies pressure to your back, which you can't loosen yourself. Features 18 protrusions to apply pressure to the shoulder blades and surrounding muscles, and a specially designed curved shape to support the back. Swaying from side to side, it powerfully loosens areas you can't reach, using your body weight. The back side allows you to gently open your chest and stretch your back, perfect for relaxation. 【Material】 Polyurethane 【Weight】 1120g 【Country of Origin】 China