Made of comfortable closed-cell polyurethane foam, this standard ball attachment combines a smaller surface area and medium impact level to deliver a more targeted percussive therapy treatment while still allowing for broad use on small and large muscle groups; it's recommended for quick re-activation and flushing lactic acid from your muscles during a workout.. Easy to clean for a hygienic experience; foam will not absorb sweat, lotions or oils.. Compatible with Theragun Pro, Theragun Elite, Theragun Prime and Theragun Mini percussive massage devices.