Light and packable, the Cirrus Flex is the ultimate year-round synthetic insulation. Its versatile enough to accompany you on any mountain adventure, either as an outer in the warmer months or as an active booster layer when the temperatures drop. With its hallmark fleece side panels that breathe on the climb and reduce bulk, its easy to layer and offers superb freedom of movement. Re-engineered with high-lofting PrimaLoft Silver RISE insulation, it features larger baffles that allow the insulation to loft more and retain more heat. Delivering exceptional warmth for weight, the insulation recovers quickly when wet, making it the ideal choice for your hikes, climbs, and scrambles in damp weather. Versatile Vest | Synthetic insulator designed for year-round core warmth whether you’re winter skiing or summer alpine trekking. Primaloft Silver Rise Insulation | Synthetic insulation mimics the properties of down while staying resilient in wetter environments. Pertex Quantum Shell & Fleece Sides | Windproof fabric finished with a fluorocarbon-free DWR for water-resistant weather protection. Alpine Ready Features | Smooth-sliding YKK Vislon front zip; zippered hand & internal pockets, one of which packs the vest inside itself for compact storage. Specs | [Best Use] Trekking, Climbing, Skiing; [Shell, Lining] 20D Recycled Pertex Quantum, PFC-Free DWR; [Sides] Thermic Fleece; [Insulation] Recycled Primaloft Silver Rise (80g); [Pockets] 2 Zippered Hand, 1 Zippered Chest (Internal); [Weight] 245g Throw on for an alpine start or layer in the deep winter, the Cirrus Flex Vest offers low-bulk, stashable warmth.