I recently purchased a pair of 3-in-1 from REI and used them this past weekend up in the Dolly Sods Wilderness in West Virginia. Temps ranged from 30 down to the low teens with light snow, some wind. I was carrying about 30 lbs, and hiking was fairly easy. I loved these gloves. The outer is mitten, waterproof and windproof with Thinsulate...not sure the rating...and the inner glove is a glove with great grips on the palm and fingers. The gloves worked well to do chores around camp, using my poles when my hands were hot, and are also insulated.
A friend came unprepared and used the outer mitt to warm her hands. The palm on the mitt is leather, but I've already thrown the things in the washer and hung to dry...look as good as new.
They are easy to tighten by pulling one side of the cuff string and ubtighten by pulling the other side of the cuff string. I think it's for snowboarders because it has a nose wipe and goggle cleaner but hey, they get wet and cold, too!