If you actually have to USE your fingers as well as keep them warm, check out some of mitten/gloves at sporting goods stores. I have a pair that are fleece, fingerless gloves...they work great...and then there is an attached mitten that you can pull over all your fingers.
Our long-time Sponsor, BackcountryGear.com - The leading source for ultralite/lightweight outdoor gear:
Affiliate Disclaimer: This forum is an affiliate of BackcountryGear.com, Amazon.com, R.E.I. and others. The product links herein are linked to their sites. If you follow these links to make a purchase, we may get a small commission. This is our only source of support for these forums. Thanks.!