You don't need to worry with either fabric. Well, I think there was a fully-lined Harris tweed trouser offered last year which must have felt a bit bulkier. But you definitely won't feel like you're wearing snow pants! Still, you might think about starting with flannel (a navy or grey is especially easy to wear), it's a little bit more formal and conventional if you're intimidated.
9/10/13 at 9:43am