Cork manufacturer direct sales muscle exercise sports relaxation yoga ball massage single ball fitness yoga cork coarse granules. This cork yoga ball is made of high-quality natural cork material, which is environmentally friendly, non-toxic, and comfortable to the touch. It is not only suitable for daily muscle exercise and sports relaxation but also effectively relieves muscle soreness and helps you improve the effect in yoga practice. The coarse granule design increases friction and provides better grip, making your fitness experience smoother. Whether you are a beginner or a professional yoga enthusiast, this massage ball is an essential fitness item to help you achieve comprehensive relaxation easily.