Whether you’re heading to the Himalayas or planning a big climb in Alaska, the Rab Men’s Positron Pro Down Jacket is up for the job. This mountain jacket is filled with lightweight, water-resistant down to offer trusty insulation, even when wet, while the weather-resistant outer material protects you from spindrifts. Rab constructed this climbing parka with a mix of boxwall and stitch-through baffles, adding extra insulation in critical areas like the torso, while also keeping the jacket lightweight and packable.