Built for long alpine hikes and backpacking trips, the Mountain Hardwear Ghost Whisperer is the lightest full-featured down jacket around—and the recipient of such awards as GearJunkie’s “Top Gear Pick,” National Geographic Adventure’s “Gear of the Year,” and Gear Institute’s “Best in Class.” Weighing in at 7 ounces and great for layering, it’s designed to resist moisture, maintain warmth, and compress to the size of a softball into its own pocket when not in use. For extra warmth in the same style, opt for the hooded version. For a core-warming option, pick up the vest.