The 400g Jacked Javelin Weighted Plyo Ball is built for javelin throwers focused on speed, precision, and arm care. Lightweight yet durable, this ball is perfect for refining mechanics, improving arm whip, and training indoors or outdoors against any wall or surface.

✅ Durable & Long-Lasting – Reinforced shell resists cracking and splitting.

✅ Speed Training – Light weight improves arm speed and quick release.

✅ Year-Round Versatility – Train on turf, concrete, wood, or gym walls.