Dynair 30-4211 20 in. XXL Level III Larger Cushion Blue An air-filled seat cushion for active dynamic sitting and for sensorimotor and proprioceptive training. Exercise equipments can be a great addition to your every exercise and work out as you can use them to add weights to bodyweight exercises. Make your body fit by use these equipments, which allow your body to get stronger. Our products have durable and quality material for extra safety and comfort. Features XXL Level III Larger Cushion Specifications Color: Blue Size: 20 Weight: 5.51 lbs