Anyone who spends a lot of time outdoors in winter knows mittens are warmer than gloves, but a pain when you actually have to do something manually. Enter the win/win world of the Arc’teryx Sabre Index Mittens, which add an independent index finger so you people with opposing thumbs can really get down to it. Fortius 1.0 fabric means “stretch,” GORE-TEX insert means “dry,” and leather in the palm and thumb mean “dexterity” so warmth and functionality become bedfellows at last.