I purchased these at the recommendation of the local running store.  They told me these gloves were "the best" in terms of keeping fingers warm.  I have Raynaud's, which is basically just poor circulation to the fingers and toes and they get cold very easily.  These did not work on me in cold conditions.  The temp this morning was 24 degrees and this is the first run where they did not work for me. When it was a bit warmer in the mornings last week, they worked ok. Will keep them for warmer than 24 degrees days!  Still looking for the gloves that work in extreme weather