I bought this for my 6 year old daughter who loves to ride in the RZR but couldn't for long periods because the car seat we were using put her in an uncomfortable position. This cushion fixed that and put her in a more natural sitting position and is super comfortable! It goes right in place in the seat and doesn't move. When not using it on the RZR the kids put it on their hover board go kart seat and it fits that well too.