Rab Alpha Flux Insulated Hoody

Polartec Alpha Direct Insulation 95g/sqm
Weighs 350g (Medium size)
Code: AW18141
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The Rab Alpha Flux Hoody is a highly breathable, lightly insulated outer or mid-layer that uses Polartec Alpha Direct technology and stretch fleece for ‘on the move’ multi-season use. 

Rab says:

Lightly insulated and highly breathable, the Alpha Flux Jacket with stretch fleece provides temperature regulation and freedom of movement for 'on the move' multi-season use.

Worn as an outer or mid layer, the Alpha Flux Jacket is a great all round piece for days when movement is key. Made with a lightweight nylon outer for increased durability and abrasion resistance, Polartec® Alpha™ Direct insulation ensures that you stay warm. An under helmet hood and front zip with internal storm flap and chin guard provide additional comfort and protection, while stretch fleece side panels allow freedom of movement. With Polygiene® odour control treatment to ensure freshness over multi-day use, the Alpha Flux Jacket is ideal for long days climbing and scrambling.

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This latest incarnation of the Rab Alpha Flux Jacket has had some slight tweaks to improve what was already a popular jacket. It now has a lightweight, durable nylon outer to help prevent bobbling from abrasion during use. I have the previous version of this jacket, and I found that to be the only negative thing when I used it for climbing. They have also dialed down the colour of the zips to make it a little more appealing. 

This Alpha Flux Hoody only has insulation in the back and front torso, and the sleeves, the sides have a stretch panel for breathability and comfort while the hood is made from the same un-insulated material. The outer shell fabric has a high stretch performance as well so that the whole garment stretches and moves as you do. Thumb loops offer flexibility of use, the hood has no adjustment - its a simple stretch fit.

It's important to note that these types of breathable insulated jackets are designed to be worn when you are active - so on the move - there are alternative insulation garments that are more suited to wearing around camp - Polartec Alpha is about keeping you vented even though you are also being kept insulated. In truth the insulation value is quite moderate so it only really comes into its own when you are exerting yourself and you need insulation but can easily get clammy if the garment doesn't breath.

- Reviewed by Ultralight Outdoor Gear

Read reviews here:

Help and advice: Synthetic Insulation explained at Ultralight Outdoor Gear
  • Durable, abrasion resistant, lightweight nylon outer
  • Polartec® Alpha™ Direct insulation
  • Under helmet hood
  • YKK front zip, internal storm flap, chin guard
  • 2 YKK® zipped hand pockets
  • Stretch fleece side panels, cuffs and thumb loops with Polygiene® STAY FRESH odour control treatment
  • Small weighs: 334g
  • Medium weighs: 350g
  • Large weighs: 352g
  • XLarge weighs: 372g
  • XXLarge weighs: 384g
  • Fit: Slim


  • Fabric Outer: Nylon,45g/m²#100% nylon
  • Fabric Contrast: Side PanelsFleece side panels#178g/m2#94% Polyester, 6% elastane
  • Insulation: Polartec® Alpha™,95g/m2#100% polyester (78% recycled)
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