I have a pair of fishing gloves called 3/2 Windstopper. Your thumb and next 2 fingers are exposed down to the first joint on both hands. They keep my hands warm and on very cold days, I insert one of the Hand Warmer packs inside the gloves on the top of my hands. My thoughts are that if I can keep the blood in the veins on the top of my hands warm, maybe my fingers will stay warmer and I think it is working.