Rab's super lightweight, super packable Xenon Mitts are exactly what you wish you had on your last hike when that cold front blew in. You'll never be caught with cold fingers again, though, because these mittens compress down to nothing and pack into their included stuff sack—perfect for travel or unpredictable mountain weather. With a waterproof outer fabric, warm synthetic insulation, and a cozy fleece lining, these mittens have everything you need for on-the-go warmth and nothing you don't.