calls these things "handcuffs," but we wanted to avoid the law enforcement angle so we're just listing them as Hestra
Glove Straps. These simple devices attach your wrist to the glove or mitten and help you avoid the dreaded "one glove" syndrome at the end of the day. These will pay for themselves many times over in the course of a season. Especially valuable for parents who need to constantly remove their gloves to help their kids.