tire pvc sand filling gravitational ball fitness ball strength training ball weight sand ball 轮胎款pvc灌沙重力球健身球力量训练球重量沙球

This tire-shaped sand ball is a great tool for fitness! Its outer layer is made of high-quality, wear-resistant PVC material, making it durable and resistant to drops, capable of withstanding intense training. The unique tire pattern design on the surface provides excellent slip resistance, ensuring safer training. The interior is evenly filled with iron sand, which stabilizes the center of gravity, allowing easy handling whether it’s for explosive strength training or muscle development.