‎ B00I1FN9SG

Pre-inflated circle-shaped, round silver disc made of durable PVC is designed to offer intensity and instability for exercises, training, & rehabilitation
For balance and proprioception training, core, upper and lower extremity strength and stability training, ankle range of motion and flexibility training
Unstable and sensory-stimulating surface facilitates automatic postural reactions, when used as a sitting cushion the disc helps activate core muscles