The Rab Men's Phantom Pants are ultralight rain pants designed for mountain running in rainy and sunny conditions. A Pertex Shield 2.5L construction keeps you comfortably dry with surprisingly high waterproof, breathability ratings for how compact the pants pack. A slim fit enhances the pants' overall packability, and pre-curved knees enable easier mobility. Rab added ultralight elastic bands around the waist and hems for snug coverage. There's an integrated stuff sack that ensures the utmost packing space for those sunny conditions.