If I'm riding less than 15 miles I'm gonna wear undies. But my undies are already spandex compression shorts so there are no seams or chaffing to worry about. I'm gonna gonna go out and buy enough shorts to ride every day when I'm probably 2 months away from being a size down. Don't have that kind of cash. I have 2 pairs now, maybe 3 soon, and that'll be enough for a while.