Gymnastic Polymetric Boxes Build explosive power and athletic performance with our durable Gymnastic Polymetric Boxes. Engineered with a sturdy EPE frame and reinforced PVC vinyl top, these boxes withstand intense plyometric training sessions. Perfect for jump training, agility drills, and strength conditioning, they help athletes develop explosive strength and improve vertical leap. The stackable design allows for adjustable heights and easy storage, while the stable construction ensures safety during every workout. Available in classic Black and vibrant Multicolour options to match your training space.