Arc'teryx Cam SV Glove

I give these gloves five stars because, for the uses I envision, they function perfectly.
Let's begin with the construction. The top is a very stretchy softshell-like material. I don't think it's laminated, but even if I try full-on blowing air through it, I fail.
The palms and fingers are constructed of leather. It's not the classiest leather ever, but it does look very burly. In between the fingers are strips of gusseted leather that allow a large range of motion for each finger. Inside, The small gauntlet is not insulated (only the softshell material) so it is very thin and tight against your skin. It adds a nice look and lets you shove the gauntlet inside a tight-fitting softshell jacket sleeve for complete isolation. The insulation looks like some sort of light-loft fleece. I believe it is a hybrid fleece so the lofted fibers are inside and the smooth low-loft fibers touch your skin.
As for warmth, they keep me reasonably warm. These are not expedition gloves. They are meant to be light gloves and will keep you warm down to 15F or so. Below that you can squeeze some smartwool liners and retain most of the dexterity, or move on to something more substantial. The cold wind doesn't penetrate them at all, although the palm area is thinner to allow for complete mobility and thus tends to get colder than the rest of the glove. These are not waterproof. I used them ice climbing, but only because it was cold enough that there was barely any water involved. They will shed rain, but melting waterfall ice will eventually make it through the glove. Try the Venta SV for something thicker, albeit waterproof. The huge benefit with these is they're dextrous enough to set ice screws and place just about any pro you can think of. Like the name implies, you can set a cam with these things on.
Just a quick note about the design. They are meant to be used for ice climbing or perhaps belaying. This means they are made with the hand cinched rather than fingers straight. If you "open" your hands, you will get a lump of material around the knuckles. It feels a bit weird, but eventually you get used to it.
If you want gloves that you could realistically perform surgery with (but please don't) yet keep your hands warm, these will do the job.

I use this as my ski touring glove, for hiking. Its great, breathable backs and supple leather palms. Great for this purpose, I was able to get a solid 175 days of use of my pair till they started falling apart. This is due to the way I treat them, running them down my ski edges as I put my skins on ruined the leather.