I just got a pair of "Men's Unpadded Cycling Skin Shorts" from http://www.aerotechdesigns.com/recumbent.htm and they're great. These are the shorts Nogyro was talking about, I think. I wear them under light weight cargo shorts and I was dry and comfortable after five hours (three on the bike) in 90F heat and 80% humidity. Was nice not being chafed and soaked for once.