Expensive.
Very!
But... It is one of the few that has results.
Do not expect the child to be always dry, it depends on the environment and the duration of stay outside.
But yes, it is recommended and helpful!

In the car seat, a simpler one with forest animals. Although cute, it doesn't do the same job.
This specific one is of much better quality. It should be noted that the child's skin is sensitive and prone to rashes. It keeps the child sweat-free on the seat for 1-2 hours.

A little expensive but very good. The baby doesn't sweat. It is easily placed and even with stains, I washed it in the washing machine and it cleaned immediately without scrubbing