Haven’t gotten them yet, so I don’t know how well they work, but I was having trouble finding mitten shells that weren’t $70.
I finally wore these today (0 degree club, woohoo!) over my lobster gloves and while they don’t cover your thumb, that wasn’t much of a problem, and my fingers stayed warm for the duration of my 25 minute ride. They also have a feature where you can flip them back pretty easily so you can use your gloved fingers for more dexterity when needed.
Minus 4 this morning, I biked the 3 mi into West View. I wore the same setup as when I motorcycled to Zelienople when it was 15 a couple Saturdays ago. Fingertips and toes got cold, otherwise it was a pleasant ride.1