PVC cushion to reduce shoulder strain. Simply lie on the cushion to open your shoulder blades and relieve stiff shoulders. The secret is the "protruding cushion." The cushion's step relieves the muscles that cause stiff shoulders. Includes a booklet for the "Shoulder Light Exercise Approximately 10-Day Program." - Product Name: Shoulder Light Cushion - Material: PVC - How to Use: Simply lie down to feel your shoulders stretch - Country of Manufacture: China Thank you for viewing. * Shoulder blades * Stretching * Stiff shoulders