Each cushion has one bumpy side for stimulation and one flat side. This massage cushion is an inflatable vestibular disc that is very similar both in the movement and in shape to the inflatable ball when used on a seat. It can be inflated or deflated to make the cushion soft or firm depending on your preference.
Dimensions: 13 1/2" X 13 1/2" X 2 1/2"
Ships within 48 hours anywhere in North America FROM North America
Wide range of quality equipment and emphasis on customer service