Lightweight and highly packable, the Cirrus Flex serves as an ideal synthetic insulation layer for use throughout the year. Its versatility makes it well-suited for a wide range of mountain pursuits—whether worn as an outer layer during milder conditions or as an insulating mid-layer when temperatures drop. Known for its signature fleece side panels that promote breathability on ascents and minimise bulk, it allows for easy layering and unrestrictive movement. Now redesigned with lofty PrimaLoft® Silver RISE insulation, it incorporates larger baffles to enhance loft and heat retention. With excellent warmth-to-weight performance and reliable recovery when damp, it is perfectly equipped for hikes, climbs, and scrambles in unpredictable or wet weather.
Features
The Cirrus Flex features signature Thermic™ stretch fleece panels that provide both breathability and unrestricted movement.
A YKK® VISLON® central front zip is included, complete with an insulated zip baffle and a fleece-lined chin guard for added comfort.
The newly designed larger baffles improve the insulation’s loft, helping to trap and retain warmth more efficiently.
It includes two YKK® hand pockets with concealed zips for secure and discreet storage.
A YKK® zipped inner chest pocket offers additional security for valuables.
Weight has been reduced through the use of a lightweight 20D Pertex® Quantum outer fabric.
Articulated sleeves and semi-elasticated cuffs enhance freedom of movement and ensure a more comfortable fit.
The hood combines fleece with synthetic insulation to reduce bulk and fit comfortably beneath a climbing helmet.
A single side hem adjustment with an anti-snag tether allows for quick, one-handed adjustment.
Multiple secure pockets are included, one of which conveniently doubles as a stuff sack for compact storage.
Sustainability Features
Fluorocarbon (PFAS) free fabric
Fluorocarbon (PFAS) free product
Greater than 75% recycled materials
Made with renewable energy
Specifications
Fit
Slim
Weight
446 g / 15.7 oz (Size M)
Centre back length
(Size M): 71.5 cm / 28.1 inch
Insulation
PrimaLoft® Silver RISE 100% recycled synthetic insulation (157 g / 5.5 oz, Size M)
Fabric
Main Fabric: 20D Recycled Pertex® Quantum outer (38gsm) with fluorocarbon free DWR
Secondary Fabric: Thermic™ stretch fleece (215gsm) side panels
Crafted entirely from recycled materials, this high-loft, loose-fill synthetic insulation delivers remarkable warmth without adding bulk. Designed for resilience, it performs reliably even in damp, cold environments.
