I really can't do that. I sit for 12 hours long, from right before the financial markets open till to a couple of hours after they close.
It's just way too uncomfortable. I've done it once, and my jacket was a winkly mess after that. The sleeves, the back, etc. it looked like I had slept in it. I suppose it works if you sit perfectly upright all day long, without ever leaning back.
That's the beauty of old fashioned heavy weight cloth. They still look good after sleeping in them on overnight flights.