I'm a fan of the convertible mitten/gloves. I use the Hot Hedz brand http://www.hotheadz.net/pogl.html and found them durable and warm, even when a bit wet. I fish all winter down to 0 F, and they still keep you warm. I also use them working (I'm a builder) . They're in my backpack ready for a trip right now. I use to use Dachstein Mitts of felted wool, but they seem impossible to get now, though they use to be the hot ticket in the 70's. For rain, I throw a cheap overmitt over them, and you have the option of warmth of the fleece mitt on or off under them. If you take the mitt off you have the option of full dexterity immediately. At times, since my shell is a little long in the sleeves, I've let my fingers exposed and tightened the cuffs around my palms. My hands stayed warm, as they are protected and warmed to the knuckles by the glomitts. It's a pretty cheap and effective modular system for me.