I was going to design one of these and market it and become a millionaire, but HD beat me to it. I bought one of theirs and took it for a test ride today. The design is very simple and I certainly don't think that it cost to manufacture half the amount I paid, but it was comfortable and did a great job. We rode for about 2 hours in the heat and humidity and my back never got sweaty or sticky like it normally does. I never noticed the addition to the backrest because of the low profile. I do recommend it.