"What Our Gearhead® Experts Are Saying:""The Cirrus Flex 2. 0 Jacket is my go-to for year-round adventures. It’s warm yet breathable, thanks to the PrimaLoft® Silver RISE insulation and stretch fleece side panels. Whether I’m layering it under a shell in winter or wearing it solo on brisk hikes, it delivers the right balance of warmth and mobility. Plus, it packs down small, making it easy to stash in my pack when the temps rise.""From pre-dawn alpine starts to crisp fall hikes, the Cirrus Flex 2. 0 Jacket is built for movement and warmth. Designed with lightweight, packable PrimaLoft® Silver RISE insulation, it retains heat while staying breathable, making it the perfect companion for layering or standalone wear. Stretch fleece side panels ensure unrestricted mobility and enhance breathability when pushing uphill, while a durable Pertex® Quantum shell sheds light moisture and wind. Whether scrambling over boulders or setting up camp, this jacket moves with you, offering warmth without the bulk. Stash it in your pack or clip it to your harness—this versatile layer is ready for any adventure."