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Rab Proton Down Jacket

130g of 800 Fill Power Down (US Method) / Atmos Ripstop Nylon Shell / Hydrophobic Down
Weighs 324g (Medium size)
Code: SS19612
  • Now £175.99
  • (FREE Delivery on orders over £15)
+ In Stock Now | Usually dispatched within 24 hours

Lightweight and packable, the Proton Jacket is a super light down-filled jacket ideal for multi-day adventures where weight is at a premium.

Rab says:

Whether you’re planning a spring ski tour or travelling hut to hut, the versatile Proton Jacket is warm and extremely packable. The lightweight Atmos™ outer and inner fabric has been chosen to allow the 800 fill power ethically-sourced hydrophobic down to loft to quickly giving instant warmth at a minimal weight.

Designed with the mountains in mind, the Proton Jacket features zoned stitch-through construction for mobility during active use, while a wind resistant outer and front zip provides extra protection from the elements. In addition to this, the jacket includes two zipped hand pockets, low profile elasticated cuffs, and stuffsack for convenient storage when on the move.

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Rab's Proton Down Jacket is effectively a lighter version of Rab's best selling Microlight Alpine. This means the jacket is light, warm and very packable (It comes with its own tiny stuff sack). The jacket is filled with responsibly sourced 800 fill power hydrophobic goose down giving a high warmth to weight ratio.

The down is housed in a stitch through construction which is zoned prioritising warmth where needed with flexibility elsewhere. The outer is a soft on the skin and made from Atmos™ ripstop nylon so it should stand up to some abuse.

There is no adjustment on the hood or cuffs which are elasticated to ensure a close fit. The hem can be adjusted to keep the wind out.

- Reviewed by Ultralight Outdoor Gear

Help and advice:
 All about down filling in sleeping bags
  • Atmos™ lightweight ripstop nylon outer fabric
  • Atmos™ lightweight ripstop nylon lining
  • 800FP R.D.S Certified European Goose Down (130g/4.6oz in size L)
  • Rab® Fluorocarbon free Hydrophobic Down developed in conjunction with Nikwax®
  • Zoned stitch-through construction for mobility
  • YKK® calendered front zip for wind resistance
  • 2 YKK® concealed zipped hand pockets
  • Low profile elasticated cuffs
  • Concealed hem drawcord adjusters
  • Stuff sack
  • Small weighs: 306g
  • Medium weighs: 324g
  • Large weighs: 336g
  • XLarge weighs: 368g
  • XXLarge weighs: 394g
  • Fit: Slim


  • Fabric Outer: Atmos™ DWR 80/20, 30g/m², 15d/15d, 100% nylon
  • Fabric Inner: Atmos™ DWR 80/20, 30g/m², 15d/15d, 100% nylon
  • Insulation: 800FP R.D.S. Certified European Goose Down 130g / 4.6oz
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