Rab Cirrus Flex Jacket – Lightweight Insulated Shell for Hiking, Skiing & Climbing | Black | Men’s M

Overview

Meet the Rab Cirrus Flex Jacket, a versatile insulated layer designed to adapt from summer day hikes to winter hut trips. Its loft mirrors down in warmth and packability, but uses synthetic Primaloft Silver Rise to stay resilient when conditions turn damp. This makes it a reliable choice for travelers who encounter variable weather on mountain routes.

The exterior rests on a windproof Pertex Quantum shell, treated to offer water resistance without adding bulk. Inside, Thermic Stretch Fleece sides provide flexible mobility for hands-on pursuits like scrambling, belaying, or quick transitions on the trail. The result is a lightweight piece that moves with you rather than against you.

Key benefits

• Seriously Flexible: lightweight warmth with mountain-ready mobility for year-round use.
• Primaloft Silver Rise insulation: loft similar to down with reliable performance in damp environments.
• Pertex Quantum shell with stretch fleece sides: windproof with flexible movement and water resistance.
• Fluorocarbon-free DWR: water-repellent protection without fluorocarbon chemistry.

Real-world use and specs

Weighing in around 13.7 ounces, the Cirrus Flex pairs a 20D recycled Pertex Quantum outer with 137g recycled Primaloft Silver Rise insulation. The design features a smooth-sliding YKK Vislon center front zipper, two zippered hand pockets, an internal zippered pocket, and an integrated storage pocket for stowing valuables or a compact layer if temps drop unexpectedly.

• Best Use: Hiking, Climbing, Skiing
• Outer/Lining: 20D recycled Pertex Quantum with DWR finish
• Sides: Thermic Stretch Fleece (215g)
• Insulation: Recycled Primaloft Silver Rise (137g)
• Pockets: 2 zippered hand pockets, 1 zippered internal pocket, integrated storage pocket
• Weight: 13.7 oz

Whether layered under a shell on colder days or worn as a stand-alone piece in milder conditions, this jacket is designed to deliver warmth without bulk. Its breathable warmth, flexible fabric, and thoughtful pocketing make it a practical companion for outdoor adventures where versatility matters as much as protection from the elements.