How to use: Place the GRID Ball on the floor. Lie on it, positioning it on the area with pain or tightness, like your hips or shoulders. Roll slowly back and forth to massage the muscles. You can adjust the pressure by changing your body position. Notice that the pressure should be comfortable, not too painful. Don't use it on open wounds, inflamed areas, or if you have serious health conditions. Maintenance is easy. Just wipe it with a damp cloth after use to keep it clean. Store it in a cool, dry place when not in use.