I use pearl izumi barrier lobster gloves for days like today (20F).

Usually if it's like 30F+ I am ok with $2 stretch gloves.

Although last week got caught in the rain and my stretch gloves got soaked. Went to put them on the next morning and they were still nasty, so stopped at the corner 7-11 to get another pair. Ended up getting these thinsulate convertible mittens for $5 which were actually pretty damn good. The problem is they smell horrible so tossed them. Not even sure if they were real thinsulate, but they did have the logo on them. Maybe will pick up another pair of those again.