The Blackroll Duoball 08 is the perfect complement for the Blackroll foam roller. The Duoball is particularly good for massaging parallel lines of muscles, for example next to the thoracic and neck vertebrae.

Features:
• Even more effective massage by keeping distance between the balls
• Ideal for treatment of parallel lines of muscles in the neck and back, since the gap is gentle on bony structures
• Also perfect for massaging shoulders, arms, and legs
• Environmentally friendly, energy-saving production
• Up to 100% recyclable material
• Free of propellant gases
• Free of other chemical propellants