Massaging the muscles with Umbro brand hand balls before and after training makes them more resilient and improves blood flow. This facilitates improved sports performance and prevents injuries! Each coloured trigger point massage ball has a different hardness, so you can choose between different massage intensities. Product features: - Material: TPR - Three types of hardness (soft, medium, hard) - Weight: 60 g - Diameter: approx. 5 cm