My wife has pinched nerves in the lower back that cause discomfort and pain when she sits for any length of time. Sitting in the car is particularly difficult because of the inability to shift position. She has two other sitting cushions, to include a lambs wool wedge prescribed by her physical therapist. Neither of those cushions provide her much relief. I wanted her to try the gel design as possibly the solution to her problem, and spent a lot of time researching cushions on the web. The Airmax cushion seemed like it might offer the best features, so I ordered one before heading out on a two-thousand mile drive to attend a wedding. I asked CONFORMAX to expedite shipping, and they did - it arrived just before we left.The construction is solid; it is a substantial cushion of foam and gel, covered by a sturdy woven fabric on one side that assists in keeping the cushion cool and a smooth fabric on the other that holds the cushion in place on the car's leather seat. The cushion is unobtrusive and fits so well that it looks like it's part of the car seat. It weighs more than I expected, another sign of good quality and substantial build. As noted in other reviews, there is no handle to grab when moving the cushion, but that isn't a problem in my opinion.The most important feature: The Airmax provides my wife with the additional support and cushioning that permits her to sit for extended periods without excruciating pain. She was able to make our road trip in relative comfort, and now uses the cushion at the dinner table as well. She loves this cushion!