Very useful. It is easily placed with one strap on the headrest (velcro) and another one that goes around the seat, at the height of the position (adjustable). Both straps are adjustable in length.

First of all, its application is great, and the quality of the material seems fine.

It does what it says. The only complaint is that it is expensive for what it does and where it grips on the head is slightly larger than desired and the seal barely holds.

It is WIDE and fully covers the width of the seat back (large family). It also has straps on the bottom that fasten together, so it securely attaches directly to the back!