Hands and feet are not easy to keep warm. You need bulk, and windproofing, maybe water resistance. Your sleeves keep water from going past the wrists of your riding gloves. Latex gloves would work as well as dishwashing gloves but only if you had an over-glove, or mitten, that was sufficiently bulky to profice insulation. Thinsulation is not magic. It is not going to be as warm as thicker insulation. It is warmer than regular cloth gloves because it is thicker. Cloth of the same thickness as Thinsulate would be just as warm! Two thin layers are warmer than one thick one because the air space between them acts like another layber of insulation. A thin latex, or silk, or cotton, liner under a normal pair of gloves will be warmer than the gloves alone or the liner alone. If you're hands or feet are warm enough they won't care that much about being wet.

H