The Cirrus Flex Insulation Vest is your perfect partner for any mountain adventure, offering versatility and performance that adapts to the seasons. Whether you're trekking through spring trails or facing winter's chill, this vest delivers warmth, comfort, and packability, making it a must-have for outdoor enthusiasts.

Ideal For: 

• Mountaineering
• Trekking
• Hill Walking

Designed for all-year use, the Cirrus Flex functions as a standalone outer layer in warmer months and an active insulating layer when the temperature drops. Its hallmark fleece side panels breathe efficiently during climbs and minimize bulk, allowing for easy layering and unrestricted movement.

At the heart of the Cirrus Flex is the re-engineered PrimaLoft® Silver RISE insulation, renowned for its high loft and exceptional warmth-to-weight ratio. The larger baffles enhance the insulation’s ability to trap heat, keeping you warm even in damp conditions. Unlike other insulations that clump when wet, PrimaLoft® Silver RISE maintains its loft and thermal efficiency, making it ideal for unpredictable weather.

Crafted with a lightweight 20D Pertex® Quantum fabric, the Cirrus Flex is designed to reduce weight without compromising durability. The vest is easily packable, stowing into one of its own pockets for convenient transport, making it an excellent choice for hikers, climbers, and travelers alike.

The Cirrus Flex is packed with practical features, including YKK® zippers, an insulated zip baffle, and a fleece-lined chin guard for added comfort. Secure your essentials in the two concealed hand pockets or the inner security chest pocket. The vest also includes an integrated storage pocket with a clip-in loop and elasticated armholes for a snug fit and extra warmth.

Perfect for mountain hikes, climbs, and scrambles, the Cirrus Flex excels in both damp and dry conditions. Whether you’re exploring alpine trails or enjoying a brisk winter walk, this vest offers the perfect balance of warmth, mobility, and convenience, ensuring you stay comfortable on every adventure.

• Fit: Slim
• Weight: 245g/8.6oz (Size 10)
• Centre back length: (Size S): 67cm / 26.4inch
• Insulation: PrimaLoft® Silver RISE 100% recycled synthetic insulation (80g/2.8oz, Size 10)
• Main Fabric: 20D Recycled Pertex® Quantum outer (38gsm) with fluorocarbon free DWR
• Secondary Fabric: Thermic™ stretch fleece (215gsm) side panels
• Fabric Lining: 20D Recycled Pertex® Quantum lining (38gsm) with fluorocarbon free DWR
• YKK® VISLON® centre front zip with insulated zip baffle and fleece lined chin guard
• 2 YKK® concealed zipped hand pockets
• YKK® zipped inner security chest pocket
• Integrated storage pocket with clip-in loop
• Elasticated armholes for warmth and comfort
• Single sided hem adjustment with anti snag tether

*These ratings compare Rab insulated jackets against each other.