Montane Prism Insulated Jacket

Primaloft Silver Insulation 40g/sqm
Weighs 398g (Medium size)
Code: AW19331
  • Now £109.99
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A modern classic, the Prism Jacket balances warmth, weight and packability perfectly as a warm mid or outer layer for any fast and light mountain activity.

Montane says:

Using weather resistant PERTEX® QUANTUM, 100% recycled 40g/m2PrimaLoft® Silver insulation and upgraded with a lightweight nylon lining; the Prism Jacket has a climbing helmet hood and good pocket options. Stuffing inside its hand pocket means it packs down small so it can be kept in your pack for a warm, windproof and weather resistant layer in almost any mountain weather.

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Montane's Prism Insulated Jacket is a year round insulation workhorse.  Light and packable enough to always have in your pack on to boost warmth when needed whether its a chilly evening at camp or are eating your summit sandwiches in a biting wind or a lengthy belay stint.

Warmth is provided by the 100% recycled Primaloft silver insulation which along with the Pertex Quantum outer results in considerable water resistance. An internal storm flap on the main zip helps keep the warmth in and the weather out. The Prism Jacket has 2 large hand warmer pockets, the right hand pocket doubles as a stuff sack with clip in loop. There is small external chest pocket as well.

The helmet compatible hood has an excellent stiffened brim which gives you extra protection from the elements. The hood can be simply cinched to size as can the hem. The wrist cuffs are elasticated for a heat sealing fit.

- Reviewed by Ultralight Outdoor Gear

Help and advice: Synthetic Insulation explained at Ultralight Outdoor Gear
Read reviews here:


  • Fully adjustable roll-away insulated climbing helmet compatible hood with stiffened peak
  • Articulated arms for high reach movement
  • Full-length YKK VISLON® front zip with internal storm flap (two-way zip Alpine red only)
  • External chest pocket with YKK zip
  • Two insulated map-sized hand pockets with YKK zips
  • Low bulk elasticated cuffs
  • Adjustable hem with cinchable drawcord
  • Stuffs into the right-hand pocket with internal carabiner loop
  • Small weighs: 384g
  • Medium weighs: 398g
  • Large weighs: 428g
  • XLarge weighs: 436g
  • Back length: 72cm (M)


  • 30 Denier PERTEX® QUANTUM outer with DWR
  • 40g/m2PrimaLoft® Silver 100% recycled insulation
  • FEATHERLITE™ Mini Rip-stop 20D nylon lining
Showing our 1 review for Montane Prism Insulated Jacket. Write a review ›
Review Summary - 4 out of 5 based on 1 rating.
April 24, 2020 | Darren
Hell yea

What a great insulation piece, lightweight, ultra packable (I mean it goes so small)

I would give it 5 but I find the cut under the arms a bit tight, but we are all different shapes - Do yourself a good turn, buy this!

Ultralight Outdoor Gear Limited