These tights are great for the chilliest of conditions. Pair these with polyester long johns, such as Uniqlo Heatteach, and you'll be good to go in pretty much any temperature.
These fit snug. I typically wear a small in New Balance shorts and bought a small originally. I couldn't get them on. I exchanged for a medium and they're pretty good. I have a little room in the waist but you can cinch them up with the drawstring pretty easily.
Pockets are handy for a phone and whatever small items you need to carry.