I used this product to mail books all over the U.S. and since I had many books to mail I saved time and trouble by buying a big pack of cushioned mailers. The only thing that may be improved would be a plastic like film over the outside to prevent water entry.
I am a musician and have to send CDs out for promotional purposes. These are just snug and safe enough--however the CDs I send out are in soft jackets so I'm able to send out about two maximum. You cannot send more than one CD if it's in a jewel case. You can probably send about five CDs with no cases however.