I have some new balance running gloves that are pretty thin and I've been using those inside some Trek Lobster Gloves. When it gets down below 25, however, my fingertips still get pretty numb. I'm guessing that the Trek Lobster gloves are garbage compared to some of the other lobster style gloves. I think that's how it probably goes for most of their clothing.

I ended up buying some Seirus All Weather Gloves but haven't tried them out on the bike yet.