Flux Jacket

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Designed for cold and damp conditions in the mountains. Featuring layered 100g and 60g PRIMALOFT® SILVER ECO combined to maximise insulation without compromising comfort, the Flux was conceived to be more than a simple belay jacket. Extensively tested on the big walls of Patagonia’s Fitzroy in some of the most changeable weather conditions on earth.
Fabric: PERTEX® Classic Eco
Lining: PEAQ Synthetic

Electric blue / Burnt orange lining / Electric blue zips / Burnt orange details
Shadow / Aurora green lining / Aurora green zips
Alpine red / Flag red / Alpine red zips

Weight (approx.): 620g /21.9oz (M)

Sizes: S, M, L, XL, XXL

Fit: Active Mountain
Activities: Mountaineering / Fast Alpine / Mountain Walking / Basecamp

RRP: £140.00

View SS15 Size Chart
View Flux Jacket features and benefits

  • Constructed from PERTEX® Classic Eco that is completely windproof, showerproof and fast drying
  • 100g PRIMALOFT® SILVER ECO in the body and 60g PRIMALOFT® SILVER ECO in the arms and hood
  • Extra layer of 60g PRIMALOFT® SILVER ECO in front of hand pockets
  • PEAQ Synthetic liner that is supremely comfortable next to the skin, highly breathable and fast drying
  • Inner hood, rear hem and pockets storm lined with PERTEX® Microlight Rip-stop
  • Articulated arms for reach high movement and tailored specifically to reduce hem lift
  • Fully adjustable helmet compatible hood with three points of adjustment and wired peak
  • Internal elastic loop and hook on rear hood compression drawcord allows hood to be rolled down and stowed away whilst not in use in windy conditions
  • Soft fleece beardguard next to chin for extra comfort
  • Two map-sized Napoleon chest pockets
  • Two deep A-line hand-warmer pockets positioned well clear of backpack or climbing harness belt
  • Internal left hand stretch mesh pocket
  • All pockets encased in PRIMALOFT® to help warm the hands
  • Full length, reversed and baffled two way front zip for ease of use with a backpack or climbing harness
  • Easy sliding YKK VISLON® zips throughout for use in icy conditions
  • Shaped cuffs with adjustable hook and loop tabs for ease of use with gloves or mitts
  • Adjustable hem to prevent spindrift entry and heat loss
  • Stuffs into right hand pocket for easy storage


160g/m², 133g/m², 100g/m², 60g/m², 40g/m² performance synthetic mid-loft insulation
100% polyester with minimum 50% recycled content
Warm when wet and fast drying
Wind resistant and water repellent
Compresses like down
Fibres produced from post-consumer and post-industrial plastic waste
Bluesign® certified fabric: manufactured to strict environmental standards using safe production methods which eliminate the use of harmful substances

PERTEX® Classic Eco

72g/m² 100% recycled Polyester 50 denier rip-stop
Air permeability 1.0cc max (JIS L 1096 / ASTM D737)
DWR finish with spray rating 80 / 20 (JIS L 1092)
Abrasion resistance 20,000+ at 12.5k PA (BS EN ISO 12947-2)

PEAQ Synthetic

56g/m² 40D x 40D 100% polyester plain weave taffeta
Exceptional comfort next to skin
Highly breathable and fast drying

  • The Flux Jacket uses PERTEX® fabric which contains a Durable Water Repellency (DWR) as the first barrier in keeping you dry. Clean your garment in order to maintain this.
  • Machine wash in warm water at 30°C/86°F with a mild detergent. MONTANE® recommends that you use Nikwax Tech Wash.
  • Do not use fabric softeners or bleach.
  • Drip dry.
  • Your jacket may need occasional re-proofing to restore the DWR. MONTANE® recommends Nikwax TX Direct.
  • Please see www.nikwax.com for more information.

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