These cushions are great for low back exercises when seated and I was told I should do these exercises by my chiro and he offered to sell me one like he used in his practice for $40. I told him I already had one similar and as soon as I got home I started looking for one on Amazon.As soon as I saw the bargain price on this one, no matter the color pink, I grabbed it. Sorry chiro. This one is exactly the type and feel as the ones he had, it even came with a small sturdy pump and air needle to inflate it and is holding air steadily for over four weeks. It’s really thick vinyl and has a large nippled side and a smother nippled other side for comfort. The larger bumps feel good on bare soles when used on the floor while seated.Excellent value, excellent product.I’m real glad I found this. Saved me money and is helping my back. Excellent product for the price.