"The Rab Cirrus Flex Hooded Jacket pairs recycled PrimaLoft Silver RISE insulation across the core with Thermic stretch fleece side panels, so the warmth stays in place without trapping heat the moment we start moving. Recycled Pertex Quantum builds both the outer shell and lining, cutting material waste without cutting the jacket's ability to block wind on an exposed ridge. What Our Gearhead® Experts Are Saying:""I've pulled the hood up under my helmet at a cold belay, and the under-helmet fit still cinches down enough to block wind at the temples instead of flapping loose."""