Basement - Montane Flux Insulated Pants

Primaloft Silver Eco Insulation 60g/sqm
Weighs 442g (Medium excl. braces)
Code: AW14108
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Montane Flux Insulated PantsMontane's Flux pants use leading edge synthetic insulation and lightweight outer fabrics to provide a winter mountaineering pant for cold conditions.

Montane says: Built for high altitude cold conditions, the Flux Pants combine 60g PRIMALOFT SILVER ECO insulation with a PERTEX Classic Eco outer shell and PERTEX Endurance Mini Rip-stop in the knees and seat for enhanced weather protection, to create supremely warm, lightweight and packable insulated alpine pants.

The Flux Pants have been designed with full winter mountaineering features including articulated knees and a diamond shaped gusset which allows unrestricted movement during high steps ups. A full length two way YKK reverse coil side leg zip provides ventilation options, allowing you to pull on quickly over footwear. The Flux Pants also come with removable stretch braces that ensure security during dynamic climbing movements.

|Pertex Endurance Lightweight outer Fabric - with a 1,000mm Hydrostatic Head and high breathability rating Pertex Endurance is a super-lightweight fabric whilst still delivering good protection and abrasion resistance. 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 Pants are an insulated pant with full length two way side zips that make them very easy put on and take off. Designed to be lightweight the shell fabrics are light, even the reinforcement areas. There are no pockets but there is a zipped fly.

There are adjustment velcro strips to the lower legs so you can reduce the bulk in this area to keep them neat, though this type of arrangement can be counterproductive in my experience as the velcro sticks when you don't want it to - i.e. when you are taking them on and off.

- Reviewed by Ultralight Outdoor Gear

Help and advice: Synthetic Insulation explained at Ultralight Outdoor Gear  
  • Constructed from PERTEX Classic Eco that is windproof, fast drying and features a durable water repellency
  • Knee and seat areas feature PERTEX Endurance Mini Rip-stop for enhanced weather protection
  • PEAQ Synthetic liner that is supremely comfortable next to the skin, highly breathable and fast drying
  • 60g PRIMALOFT SILVER ECO insulation throughout is warm, packable and exceptionally fast drying
  • Articulated knees and a diamond crotch for step high movement
  • Come with removable stretch braces to secure pants in place during dynamic movement
  • Fine microfleece lined inner waist band for additional comfort
  • Front fly with YKK zip
  • Full length two way YKK reverse coil side zips provide ventilation options and the ability to pull on without removing footwear
  • Hook and loop calf adjustment to reduce volume around the legs
  • Press stud ankle adjustment for tight fit against footwear and to prevent heat loss



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)



PERTEX® Quantum Rip-stop

37g/m² 100% Polyamide mini rip-stop weave
Air permeability 1.0cc max (JIS L 1096 / ASTM D737)
Spray rating 80 / 20 (JIS L 1092)
Abrasion resistance 10,000+ 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

  • Fabric: PERTEX Classic Eco
  • Reinforcement: PERTEX Endurance Mini Rip-stop
  • Insulation: 60g PRIMALOFT SILVER ECO
  • Lining: PEAQ Synthetic
  • Zips: YKK reverse coil
  • Small size weighs 484g, 416g without braces
  • Medium size weighs 510g, 442g without braces
  • Large size weighs 544g, 476g without braces
  • XLarge size weighs 554g, 486g without braces
  • XXLarge size weighs 574g, 506g without braces
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