Great for long car rides
I use this in my car and it is a lifesaver for lumbar support.  It is soft but still supportive.  If you wrap the strap around the seat it can be a little uncomfortable but it works just fine without the strap.  I saw some reviews that it can't withstand heat but it has sat in my car in triple-digit temperatures all summer and is still in perfect shape.  It's made of silicone so it can withstand pretty high temps
Rating: 5 stars