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Men's Siege Technical Fleeces

Lightweight men's mid-layers and fleece jackets built for hiking, mountaineering, skiing, and trail running in colder climates and winter weather....

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Jack Is 6ft 3" And Wears Size: L | Hem Studio Image Of Model Wearing Siege Tech Fleece Hooded In Obsidian Black (SS Model)

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Jack Is 6ft 3" And Wears Size: L | Hem Studio Image Of Model Wearing Siege Tech Fleece Hooded In Obsidian Black (SS Model)

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SIEGE TECH FLEECE HOODED

SIEGE TECH FLEECE HOODED

Men's black lightweight hooded mid layer fleece

€175,00 EUR

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Jack Is 6ft 3" And Wears Size: L | Hem Studio Image Of Model Wearing Siege Tech Fleece Full Zip In Wolf Grey (SS Model)

Jack Is 6ft 3" And Wears Size: L | Hem Studio Image Of Model Wearing Siege Tech Fleece Full Zip In Wolf Grey (SS Model)

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SIEGE TECH FLEECE FULL ZIP

SIEGE TECH FLEECE FULL ZIP

Men's grey lightweight zipped mid layer fleece

€170,00 EUR

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In stock.

Rudie Is 6ft 2" And Wears Size: M | Hem Studio Image Of Model Wearing Siege Tech Fleece Half Zip In Khaki (SS Model)

Creative Image Of Siege Tech Fleece Half Zip In Khaki (ITF)

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SIEGE TECH FLEECE HALF ZIP

SIEGE TECH FLEECE HALF ZIP

Men's green lightweight half zip mid layer fleece

€145,00 EUR

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In stock.

Jack Is 6ft 3" And Wears Size: L | Hem Studio Image Of Model Wearing Siege Tech Fleece Full Zip In Khaki (SS Model)

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Jack Is 6ft 3" And Wears Size: L | Hem Studio Image Of Model Wearing Siege Tech Fleece Full Zip In Khaki (SS Model)

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SIEGE TECH FLEECE FULL ZIP

SIEGE TECH FLEECE FULL ZIP

Men's green lightweight zipped mid layer fleece

€170,00 EUR

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In stock.

Jack Is 6ft 3" And Wears Size: L | Hem Studio Image Of Model Wearing Siege Tech Fleece Half Zip In Wolf Grey (SS Model)

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Jack Is 6ft 3" And Wears Size: L | Hem Studio Image Of Model Wearing Siege Tech Fleece Half Zip In Wolf Grey (SS Model)

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SIEGE TECH FLEECE HALF ZIP

SIEGE TECH FLEECE HALF ZIP

Men's grey lightweight half zip mid layer fleece

€145,00 EUR

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In stock.

Rudie Is 6ft 2" And Wears Size: M | Hem Studio Image Of Model Wearing Siege Tech Fleece Hooded In Khaki (SS Model)

Rudie Is 6ft 2" And Wears Size: M | Hem Studio Image Of Model Wearing Siege Tech Fleece Hooded In Khaki (SS Model)

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SIEGE TECH FLEECE HOODED

SIEGE TECH FLEECE HOODED

Men's green lightweight hooded mid layer fleece

€175,00 EUR

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In stock.

Jack Is 6ft 3" And Wears Size: L | Hem Studio Image Of Model Wearing Siege Tech Fleece Full Zip In Obsidian Black (SS Model)

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Jack Is 6ft 3" And Wears Size: L | Hem Studio Image Of Model Wearing Siege Tech Fleece Full Zip In Obsidian Black (SS Model)

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SIEGE TECH FLEECE FULL ZIP

SIEGE TECH FLEECE FULL ZIP

Men's black lightweight zipped mid layer fleece

€170,00 EUR

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In stock.

Jack Is 6ft 3" And Wears Size: L | Hem Studio Image Of Model Wearing Siege Tech Fleece Half Zip In Obsidian Black (SS Model)

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SM Cut of Out Siege Tech Fleece Half Zip In Obsidian Black (GM)

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SIEGE TECH FLEECE HALF ZIP

SIEGE TECH FLEECE HALF ZIP

Men's black lightweight half zip mid layer fleece

€145,00 EUR

Select size to add to cart:

In stock.

Jack Is 6ft 3" And Wears Size: L | Hem Studio Image Of Model Wearing Siege Tech Fleece Hooded In Wolf Grey (SS Model)

Creative Image Of Siege Tech Fleece Hooded In Wolf Grey (ITF)

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SIEGE TECH FLEECE HOODED

SIEGE TECH FLEECE HOODED

Men's grey lightweight hooded mid layer fleece

€175,00 EUR

Select size to add to cart:

In stock.

FAQ'S

Our lightweight men's mid-layers and men's fleece jackets are ideal for hiking, mountaineering, skiing and trail running in colder climates and winter conditions. The Siege men's tech fleece and men's insulated clothing deliver optimal performance across demanding outdoor activities.
Constructed from innovative Polartec® Power Grid™ fabric, the Siege men's tech fleece and men's insulated clothing will keep you insulated without overheating during outdoor activities. This advanced material provides superior thermal regulation compared to conventional men's fleece jackets.
The Siege men's tech fleece uses innovative Polartec® Power Grid™ fabric that maintains insulation while preventing overheating during active pursuits. These lightweight men's mid-layers deliver optimal warmth management for hiking, mountaineering, and trail running in colder climates.

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Men's Siege Technical Fleeces

Lightweight men's mid-layers and fleece jackets built for hiking, mountaineering, skiing, and trail running in colder climates and winter weather. Made with innovative Polartec® Power Grid™ fabric, the Siege tech fleece keeps you insulated without overheating during outdoor adventures.

When your activities push your limits in tough cold conditions, ordinary fleece just doesn’t cut it. Siege tech fleece uses advanced fabric technology to keep you warm and comfortable while adapting to your activity level.

This collection is all about lightweight mid-layers that provide the perfect balance of warmth and breathability — no heavy insulation, just smart design to keep you cozy without the bulk.

Thanks to Polartec® Power Grid™ fabric, every piece offers superior thermal management, so you stay comfortable no matter how intense your hike, climb, ski, or trail run gets.

Check out the Siege Tech Fleece Full Zip. Its full zip design lets you control ventilation easily as your body heats up or cools down during varying activity levels.

This jacket is perfect for mountaineering and other dynamic outdoor sports where conditions and exertion change fast. It keeps you comfortable whether you’re climbing hard or taking a breather.

Ideal for multiple disciplines, the full zip combines insulation and breathability, keeping you warm without overheating in winter’s toughest conditions.

If you prefer something more streamlined, the Siege Tech Fleece Half Zip offers targeted ventilation with a half zip that’s great for trail running and skiing — activities where you want less bulk and precise temperature control.

The half zip keeps the same great insulation and breathability, all while letting you move freely without fussing with a full zipper.

For those who need extra coverage, the Siege Tech Fleece Hooded adds head protection with a hood that works seamlessly with the jacket’s thermal management technology.

This hooded fleece is made for serious winter mountaineering and hiking, keeping your core and head warm while still allowing breathability during high-output activity.

The advanced fabric helps prevent moisture buildup and keeps you insulated without overheating, no matter how tough the conditions get.

The whole Siege tech fleece collection is designed to work together as a comprehensive thermal system — perfect for layering or wearing on its own — adapting to whatever your outdoor day throws at you.

These men’s fleece jackets aren’t just for one activity; they’re versatile enough for hiking, mountaineering, skiing, and trail running, giving you reliable warmth and comfort across the board.

From the full zip’s all-around control to the half zip’s sleek efficiency, and the hooded fleece’s extra protection, each piece features cutting-edge fabric technology that delivers smart insulation without the heat trap.

Whether you’re building a winter layering system or picking the perfect jacket for your next adventure, the Siege tech fleece collection has you covered with lightweight, breathable, and performance-driven gear.

Discover how Polartec® Power Grid™ fabric is changing the game for men’s insulated clothing, keeping you warm and dry without overheating — ideal for demanding winter activities in cold climates.

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