The Rab Men's Cirrus Flex Jacket is a versatile insulator that you can wear year-round whether you're summer backpacking or touring on hut trips in winter. It has the same packable loftiness as a down jacket, but since it's a synthetic insulator, it retains its lofty warmth in wetter, damper environments. The Cirrus Flex has a windproof shell finished with a fluorocarbon water-resistant coating for reliable weather protection. There are stretchy fleece sides ensuring mobility for active pursuits.