Window felt

. . . . and I was just looking for the felts and was going to put them on the old channels. Is that possible or do I need to spend on the high dollar exact fit product?
Thanks for the help
Rod

Ulf just bought the felts. He had them shipped to me since they come in 8 foot lengths and they wouldn't cut them nor ship to Sweden. I cut them in half and sent them on their way to Sweden.