We are using the 2-Twin XL foam toppers on our new split king bed that "pumps up with air" (omitting the brand name).
By using these from Great Offer Stock, we saved hundreds. The matteress store wanted several hundred dollars for 2 foam toppers.
The foam is odorless, durable, comfortable and perfect for us.
I highly recommend this product for any use where a comfortable, high quality foam topper is needed.