Yep, this he-man, macho retired Navy Senior Chief Petty Officer wears silk underwear! All 6'3", 240 lovable lbs of him! And they are fantastic!
I rode today in 50 degree weather with a new pair of Redhead silk underwear I bought at Bass Pro for $44, including tax. I also wore knee warmers, a wind stopper vest and my rain suit and I was over dressed! When I got back after my ride, the silk was soaked. I could have gotten by without the knee warmers and the vest, and probably a jersey instead of the jacket.
The silk is worth every penny of the $44 I paid. Sometimes, 50 degrees isn't cold, but the air was cold and there was a stiff breeze blowing, giving a windchill of around 40-45.