The sturdiest of the foam and the cover material
I did not get this for pain relief I recently had a knee replacement ( that should describe the pain) and I use this to help exercise. The foam is very sturdy and the cover appears to be durable and easy to clean.  I have been in constant pain for the last twenty five years and if I do not take my pain meds in time I lay flat on the floor and use a chair to put my legs because of the severity of my pain I don’t see it helping out there  I finally decided to have the back surgery this year that  was recommended twenty five years ago.
Rating: 5 stars