inside-of-glove fingers-curl
Refers to the chillier-weather hand-maneuver that you periodically perform when your digits get chilly inside your mittens; it involves withdrawing your half-frozen appendages from the glove's cold-moisture-soaked fingers and rolling them up into your palm to help warm them a bit more.
I had to handle wet items while running my errands around town during today's unseasonable snowstorm, so I was obliged to frequently perform the inside-of-glove fingers-curl so that my hands wouldn't go numb.