BLACKROLL Balls are ideal for targeted self-massages on different areas of the body. They are perfect for targeting specific tight spots and massaging deeper-lying muscle groups. Use them on a table, on the floor or against a wall. The German-made BLACKROLL balls are environmentally friendly as they are made using an energy-saving production process and they are free of propellants and chemicals. They are easy-to-clean, water resistant and odorless.