When temperatures start getting down there into the do I really want to work out?
range, turn it around with a pair of Pearl Izumi Women's Select Thermal Barrier Pants. They feature Pearl Izuzmi's own SELECT Thermal Barrier that keeps wind and cold out, and also keeps you dry as you warm up. The semi-form fit looks and feels great, and 1 back zippered pocket hold gels, ID, etc.
Note: Ideal for temps between 35-45°