A first trip over 14 hours in a (comfortable) Coach has taught us what is missing between the seat and butt. Looking for a foldable or rollable air cushion we chose the above model. Fast delivery within a few days. The self-inflating function is simple and effective. The 2 Travel with a comparable bus, again about 14 hours was a nine compared to the first trip a pleasure. As a small role the pillow fits at the end of the journey in each rice bag. Recommended. HS