I have spent a lot of money on gloves, including claw types. I have found the claw types to be warmer for riding than regular gloves at temperatures below about 40 degrees F. I normally wear a medium glove, but the reviews indicated that these gloves ran small, so I got the large. The large size felt like a medium which was good for dexterity, but fell short for warmth. If I were to buy these again, I would prefer to get an extra large, which unfortunately is not available at this time. I think a larger size would provide some air space inside that would improve warmth, especially since these do not seem to be windproof, possibly to improve breathability. The separate insulation that surrounds the fingers seems like a good idea but does not seem to work well. The claw design is really to place individual fingers (without the thumb) together in two groups to generate and improve warmth, but I have found that my hands get just as ice cold with these gloves as any other pair of gloves that I have had in the past, with the exception of an old pair of claw gloves without separated interior finger holes I got a long time ago that eventually wore out. I would suggest that a windproof layer of fabric be used as the outer part of the glove to prevent any cold air from getting into the glove. The palm area could be breathable, since it would be facing away from the on-coming very cold wind. This seems to be a problem with all of the gloves that I have purchased. They are warm when there is no wind (standing still) but can be very cold when riding. Sorry for the long review, but I have been able to stay warm in ice cold conditions, except for my hands. I commute to work daily by bike and I have not found anything that will keep my hands warm after about 10 minutes of riding.