Bit disappointed with these gloves. I ended up going from a medium to a small and still the gloves is extremely bulky and doesn't fit properly (I'm not sure who thinks people have such long fingers). The long overlap doesn't fit over any jacket so it ends up making the glove come off instead of being fit (remember we wear these with jackets on). I am with SAR and ski patrol in Whitehorse, Yukon and these gloves do not keep me warm in -20. And considering its only going to get colder - bit disappointed. I can't grip anything, even my ski poles - these gloves would only be good for standing around doing nothing (maybe at Yukon quest if it isn't -40 out. If you need dexterity, don't get these gloves. If you need warmth - pay less for something else. I dont know if the battery operated gloves would work? I'd think at the temps here the batteries would die rather quick unless there's a battery cable that could connect and keep the batteries on your body and warm. Hopefully one day will find a pair of gloves that work!