From yurt trips to mountaineering expeditions, the Rab Men's Photon Pants will boost your warmth when you're belaying, enjoying a summit snack, or kickin' it around basecamp. Waterproof, extra durable panels on the seat, knees, and kick panels keep you dry should you choose to sit in the snow, and a generous helping of synthetic insulation traps your body heat while still keeping these puffy pants packable enough to take everywhere.