These Massage Balls are a great tool to use in releasing tension and tightness as a result of sports or workouts, sitting for long periods of time/office work, or day-to-day activities. Use our massage balls individually by placing one between the wall or floor and your tight muscle, or together placed on either side of your spine. You control how deep or gentle the massage is by placing more or less weight against the ball(s). This size is great for medium to large size muscles or tension points. Provides medium to firm pressure. Cleans easily with soap and water. Avoid direct sunlight and dust.