Basement - Montane Flux Insulated Jacket - Past Season

Primaloft Silver Eco Insulation 100g/sqm
Weighs 634g (Medium size)
Code: AW14128
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Montane Flux Insulated Jacket - Past SeasonMontane's Flux Jacket is a modern classic. By using 100g Primaloft combined with lightweight fabrics and informed design Montane have created a near-perfect insulated jacket.

Montane says:

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.

|Pertex Microlight Lightweight outer Fabric - A good balance between weather & abrasion resistance against the weight of the fabric. Click Logo to read more...
Primaloft logo at Ultralight Outdoor Gear|PrimaLoft® Silver Insulation Eco; Uses recycled content to create the highest performing eco-friendly insulation available.Click Logo to read more...
Montane Logo at Ultralight Outdoor Gear|Click here for more info on Montane, product updates and New Season information.

Montane's Flux Jacket is an awesome piece of kit. The high warmth to weight ratio of Primaloft combined with lightweight face and inner fabrics means that the Flux jacket is very warm indeed and belies its weight in sheer insulation value. Only Down provides a higher warmth to weight ratio but with the Flux you get near indestructability combined with all the right design cues.

We especially like the fully adjustable hood, four external pockets and one internal mesh pocket. The cuffs have an adjustable velcro closure and the front zip is two way. We love it.

- Reviewed by Ultralight Outdoor Gear

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



PEAQ Synthetic

56g/m² ultra soft nylon plain weave
Exceptional comfort next to skin
Highly breathable and fast drying


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)



133g/m², 100g/m², 60g/m², 40g/m² performance synthetic mid-loft insulation
Warm when wet and fast drying
Wind resistant and water repellent
Compresses like down
Fibres produced from post-consumer and post-industrial plastic waste
Minimum of 50% recycled content

  • Small size weighs 604g
  • Medium size weighs 634g
  • Large size weighs 650g
  • XLarge size weighs 676g
  • XXLarge size weighs 702g


Care Instructions:

  • 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 for more information.
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