About this item

• Made of high quality PVC material, lightweight and durable, no easy to deform.
• Bottom chamber is for water or sand to increase weight to keep it stand stable on the ground, more stable and reliable.
• Upper chamber is for inflating air to avoid scratching the skin of your limbs, soft and elastic.
• Resilient backbone for better stability, bounce back up immediately without falling over.
• Great accessory for improving coordination and flexibility, burning calories and relieve pressure, suitable for kids, teens and adults.