One piece 44L works for me on both positions for riding, better a little extra room then singing soprano or thinking about your suit while riding. Sending my suit in for a repair soon.
Picture attached is the melted outline of my left exhaust on my one piece , my butt did not get burnt and the suit saved alot of blood and suffering after landing on loose rock. I was face down with the bike on top of me. So glad i was wearing aerostich rather than my lesser suit. ingmar
