Indeed. Many suits are two layers of leather in the knees, elbows and seat. Still very uncommon for the first layer to burn through in a slide but it does happen once in a great while. I was actually just talking to a friend about his last track incident, at about 100mph, and he did say that as he slid he turned himself over because he was getting hot from the friction!
"If One wishes to Win It, One must first Pin It."
69 Honda CB175 | 02 Honda XR80R | 06 Suzuki GSX-R600 | 08 Kawasaki Versys