Bags available in 2 sizes, 20kg or 30kg. Sandbag workouts: Challenging and never boring. You will be fatigued after every drill with these tools! The sand bag is shifting and changing every time you move it, which makes this workout challenging and effective. You can go heavy or light. You Choose: heavy, slower more controlled movements; or lighter, with more speed and reps! You can train individually or with large groups, and this tool will bring change and results. Oh yeah, and sweat! Includes inner bags to fill so you can adjust to your own weight needed.