I have coccyx pain syndrome, so sitting is always painful. The doctor ordered to purchase a special orthopedic pillow. Due to the extra weight, I chose a model for a long time. Didn't guess! This pillow is elastic, but under my 130 kg does not crumple into a pancake like others. A special notch under the coccyx relieves pain. (There is an insert, I immediately took it out). The pillow is ergonomically designed. Case of noble and not easily soiled gray color; removed; can be washed (truth never washed). I have been using it for several months both at home and when going out, the pillow helps out a lot. The only wish to the manufacturers is the opportunity to buy a spare cover for the pillow. True, I found a way out for myself - in public places I use a pillow in its "natural" cover, and at home I put the pillow in a pillowcase specially allocated for this and use it that way.