Montane Sirocco Lite Insulated Jacket

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UOG TOP PICK: Light, warm, and breathable, this jacket excels at keeping you comfortable during high-output activities.A top pick for year-round use

Montane says: 

This durable yet technical jacket has 4-way stretch for dynamic movement in the mountains.

The Montane Men’s Sirocco Lite Insulated Jacket delivers a high-performance combination of breathable wind resistance and warmth for adventures at altitude. First, your core is warmed by 100% recycled, highly breathable Dynamic Insulation with 4-way stretch. It retains heat even when wet, without overheating, and is protected by highly wind-resistant FEATHERLITE AIR 100% recycled nylon with its PFC-Free DWR coating and in-built stretch. Then, 4-way stretch fleece on the arms delivers a smooth-faced, brushed back design that’s ideal for use in a layering system, which can adapt to unpredictable weather and inspire confidence in the outdoors.

Our Verdict

The Montane Sirocco Lite Insulated Jacket is an exceptional blend of lightweight insulation, breathability, and wind resistance, perfect for active outdoor enthusiasts tackling variable conditions.

This hybrid jacket uses wind-resistant, recycled insulation across the core to trap warmth. At the same time, fleece panels on the arms and sides ensure excellent breathability and stretch for unrestricted movement. This balance of warmth and airflow makes it ideal for high-energy activities like hiking and climbing. The trim fit and articulated cut allow full mobility without compromising comfort, whether worn as a standalone layer or under a shell.

Practical details like low-profile stretch cuffs, hem, and a lightweight, full-length zip add to its versatility. However, wearing a harness might make the lower pocket placement less convenient.

At 264g (size M), the Sirocco Lite offers impressive performance without weighing you down. It is an excellent choice for year-round use, as an outer layer in spring and summer or a dedicated mid-layer during autumn and winter.

– Reviewed by Ultralight Outdoor Gear

Features

• Performance Mapping: Materials are positioned to maximise performance where it’s needed
• Double-sided Collar: For extra protection and warmth
• Full-Length Zip: Lightweight No.3 YKK front zip reduces weight and improves layering ability
• Low Profile Seams: Increased durability and comfort from low-profile seams
• Comfort Cuff & Hem: Low profile stretch cuffs and hem avoids chaffing

Specifications

• Small weighs: 249g
• Medium weighs: 264g
• Large weighs: 271g
• XLarge weighs: 289g
• XXLarge weighs: 299g
• Suitable for: Hiking, Walking, Mountaineering, Climbing, Trekking, Trail Running, Fastpacking, Ski Touring
• Fit: Trim – Close-fitting for fast-moving, active users with added articulation
• Model: Size M. Height: 6’0″/183cm, chest 39″/99cm

Material & Construction

• Outer: 100% Nylon (recycled)
• Insulation: 100% Polyester (recycled)
• Fleece: 50% Polyester (recycled) 42% Nylon 66, 8% elastane

Help & advice:

• Time-Saver Guide to Choosing a Synthetic Jacket
• Synthetic Insulation Explained
• About Montane
• Recycled Content in Outdoor Gear
• Why is ‘PFC Free’ Important?