I bought them so that I can use it for my long international travel in planes - the seats i am sure all of you know does not have much cushion. It works ok but the smell of rubber is so strong that i had to make s cloth cover still did not help, so i used to carry it inside a plastic bag and take it off when using. The other day i found a clear $5 same plastic cushion, no smell, cheaper, looks better from HEB pharmacy area. Now I am a happy camper and have carex ring cushion for anyone who needs them.