I recently picked up a pair of Vallerret Power Stretch Pro Liners and really like them. I was very deliberate in following their sizing guide and advice, ended up with a pair that's a size down from what I'd normally buy and it was a great choice. These are just liners, though, and work really well for above freezing temps. I got these to pair with some Vallerret Markhof v2 gloves that I've had for a number of years now but really haven't used. I find them to be very bulky (especially so with the liners on) and not that great at keeping my hands warm. I wore them (with the liners) to a Christmas parade a few weeks back in 20F-something weather and was somewhat surprised at their ineffectiveness.
Wear nitrile gloves under any comfortable glove and be amazed at how much cold air they block and under an insulating glove, retain heat. I wear them when I go skiing or riding my road bike in the cold or rain.
