My Wave came with the backrests. I've never raced so the backrests have never come off. On windy days, I can hook a foot under a hiking strap, sit on the top of the backrest and lean out. What I like most is the ability to stay above most of the spray the boat generates. Because it is round, but well padded, it is fairly comfortable however, you do need to shift around a little. I'm in my upper 50's and the b'rest feels pretty good after more than a couple of hours of sailing.
Sincerely, Pete!!!