These mitts have fleece finger separators inside of them -- essentially gloves with mitten covers! After just 10 minutes, my pinkies were ice cold because they were separated from the rest of my fingers. I do live in an area with extreme winters (it was -35 the other morning), but I do not have any hand circulation problems. You need thick, waterproof mittens with your fingers together for maximum warmth, especially if you participate in winter sports. The finger slots inside also prevent you from putting in chemical heat packs (if you want/need to).

My previous mitts (five years ago) from Marmot were awesome, but these have been returned.

am returning the mitts. no description included to indicate there was an interior glove. cannot put in hand warmers. my last marmot mitt did not have an interior glove...

I have these Marmot mitts from a couple years ago. They are pretty warm and really waterproof. I like the leather stuff on the palms, since I ski they grip the poles really well. I do think there is a little too much room inside the actual mitt, so they aren't as warm as they could be. But I've had them for awhile and they're definitely quality.

When the temperature drops below about 15 degrees I usually opt to take these with me for my resort skiing and backcountry use. I put a thin liner underneath when I need to take off the mittens to tie or take something off. Held up very well and kept me very warm and dry.