Safe, but collapsible
I ordered a Sleepypod after trying different backpacks that doubled as a carrier and reading reviews on other options such as booster seats and harnesses that attach to seat belts. I have a small dog who isn't always 100% on car rides. I was hoping that this would stop some of the whining. It does and doesn't. On the way to our destination he still whines, but once he is worn out and back into the pod the whining ceases. The sides are firm and there is a clip for attaching the seat belt, but it is only for one side. While it does zip all around, I found one side had a slight zipper issue at a corner so it would be nice if I could latch the seat belt on either side. If there is a way to do that, I'm not seeing it. In all, the slight zipper issue (it catches and is difficult to move at a point) is not a huge deal compared to the relative silence I get on part of my drive.