If you can these part of your jacket you won't believe how hot your gloves become. The heat from your body gets pumped down your sleeves into your hands.
My jacket has them but I've never used them. I always thought hey were pointless but I'll take your advice and try em out this weekend and see if it makes a difference.
I've heard a lot of good things about Black Diamond Mitts. If they really are that warm and durable enough to last me a couple seasons I wouldn't mind spending a little more. I'll try them next time I can