Basement - Montane Chonos Ultra Down Jacket

250g of 800+ FP Down (US Method) / BOX WALL Construction / PERTEX Quantum Y Yarn outer shell
Weighs 632g (Medium size)
Code: AW14103
  • Now £149.99
  • (FREE UK & EU Delivery)
Item out of Stock | Usually dispatched within 24 hours

Montane Super Terra Pants

Montane Chonos Ultra Down Jacket uses the very best Box Wall construction method to maximise the effectiveness of the down combined with lightweight fabrics to keep the total weight to a minimum for this high performing jacket.

Montane says:

Built for high altitude and extreme cold conditions, the Chonos Ultra Down Jacket combines high quality goose down and a unique PERTEX Quantum Y Yarn outer shell fabric to create a supremely warm, lightweight and packable weather resistant boxwall jacket.

The Chonos Ultra Down Jacket has minimalist weight saving features including a tailored ‘active mountain’ fit that prevents the hem raising whilst reaching high, a fully adjustable helmet compatible hood that can be easily stowed away, two deep A-line hand-warmer pockets and its own waterproof dry bag.

Montane Logo at Ultralight Outdoor Gear| Click here for more info on Montane, product updates and New Season information.

Montane's Chonos Ultra Down Jacket employs a range of features to achieve a very low weight for a fully featured down jacket with Box Wall construction containing 250grams of down. The use of super lightweight fabrics and a mountain cut are two ways in which weight is saved - but in all other respects weight is added so as not to compromise on features.

For example the box wall construction adds a lot of weight comparatively speaking but really enhances the performance of the jacket compared to most other down jackets (which use stitch through construction). Box wall creates better pockets for the down to loft into with fewer 'pinch points' and cold spots to compromise performance - its a much more effective construction technique, but its also much more expensive to produce.

The other features are pretty standard for a technical jacket - the cuffs are elasticated (presumably to save a bit of weight). The hood has a wired peak and a simple velcro volume adjuster. Its a relatively close fitting garment which also preserves a high level of performance.

- Reviewed by Ultralight Outdoor Gear

Read reviews here:      
Help and advice:All about down filling in sleeping bags
  • Constructed from PERTEX Quantum Y Yarn which provides enhanced downproofness and a strong tear strength
  • Features Super 100 DWR that provides excellent water shedding through extended periods of wear
  • PERTEX Quantum Rip-stop lining throughout ensures the jacket is incredibly lightweight
  • Technical tailoring to prevent arm lift raising the lower hem whilst reaching high
  • Articulated arms with engineered tailoring to prevent seams constricting over elbows and biceps
  • 250g of 90/10 high quality goose down at 800+ fill power
  • Full boxwall construction provides superior warmth and eliminates cold spots
  • Fully adjustable climbing helmet compatible mountain hood
  • Hood lined with PERTEX Quantum Y Yarn for additional water repellency
  • Hood visor stiffened with a foam insert and a wire on the lip for adjustability
  • 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
  • Two deep A-line hand-warmer pockets
  • External zips feature U-shaped pulls for use with gloves or mitts
  • Full length, reversed and baffled two way YKK front zip for ease of use with a backpack or climbing harness
  • Lower adjustable hem to prevent spindrift entry and heat loss
  • MONTANE ‘penny cordlocks’ on lower hem sides to create a low profile for comfort under climbing or rucksack harness
  • Own waterproof storage MONTANE dry bag


Pertex Quantum Y Logo|

PERTEX® Quantum Y

35g/m² 100% nylon 20 denier rip-stop
Y-shaped yarn construction for an extremely lightweight yet durable finish.
Air permeability 1.0cc max (JIS L 1096 / ATSM D737)
Abrasion resistance 10,000+ at 12.5k PA (BS EN ISO 12947-2)
Super DWR finish with spray rating 100/20 (JIS L 1092)

Pertex Quantum Logo|

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)

Montane Super Water Repellency Logo|

100 Super Water Repellency

Is a highly durable water repellent finish that provides excellent water shedding through extended wash and wear

  • Fabric: PERTEX Quantum Y Yarn
  • Insulation: 250g (M) of min 90/10 goose down at 800+ fill (USA) CERTIFIED NON LIVE PLUCKED & NON FORCE FED DOWN
  • Lining: PERTEX Quantum Rip-stop
  • Zips: YKK reverse coil
  • Small size weighs 616g
  • Medium size weighs 632g
  • Large size weighs 646g
  • XLarge size weighs 660g
  • XXLarge size weighs 672g
Be the first to review Basement - Montane Chonos Ultra Down Jacket. Write a review ›