Definition [Womens]

Waterproof mountaineering jacket


Waterproof mountaineering jacket for the harshest of conditions: impenetrable storm protection, whatever the mountains throw at you

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  • Black
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  • UK
  • UK 8
  • UK 10
  • UK 12
  • UK 14
  • UK 16
  • UK 18

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Definition [Womens] Waterproof mountaineering jacket


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This item is on pre-order. It is due to arrive in stock soon and should be available from soon. We'll keep you up-to-date with your order progress and despatch as soon as it is available.

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A fortress of a jacket, the Definition has been designed to safely encase you from the wettest, windiest, and wildest of mountain weather. Fully featured and tough as old boots, the Definition is the ideal jacket for Scottish winter epics, committed alpine climbing and year-round Munro bagging.

Highly waterproof (30K HH) and breathable (20K MVTR), the Definition will keep you safe and dry, even in savage highland storms. We’ve used a 3-layer construction, providing long-lasting performance and protection from exposure. Whether scrabbling up chimneys or scraping along traverses, the durable nylon outer stands up to the rough abuse of mountain use, and a strong nylon backer protects the PU/PTFE waterproof membrane.

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Designed to sit over multiple layers, the Definition is cut with pre-shaped arms to avoid riding up and exposing your back or tum when you’re reaching up for holds or swinging ice-axes. A large hood is sized to comfortably fit over a climbing helmet, deflecting spindrift from engulfing your core, and the wired peak and three elastic adjusters allow you to really batten down the hatches when the weather rolls in. A two-way YKK Vislon Aquaguard main zip (complete with internal storm-flap) accommodates harnesses, completing the mountaineering-ready feature set.

Map-sized main pockets have been designed to sit clear of your rucksack straps, hip-belt or climbing harness, as have the innovative vents. The inverted vent-zips are easier to open and close when overheating than traditional pit-zips, giving you easy access your midlayer pockets too. All external zips use YKK Aquagard water-resistant zips and an internal and external chest pocket add secure storage options. Catch-proof hem adjusters are neatly concealed within the main pockets, and gusseted cuffs fit easily under or over gloves, with anti-snag Velcro adjusters.

'The Definition is arguably as good or better than some jackets costing twice as much. The cut is sleek and efficient, components are top-notch... the unbranded fabric works well and feels reassuringly tough. The effective helmet-compatible hood means you can use it for anything from full-on mountaineering to general hill-walking' - Outdoors Magic

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Key Features

  • Reliable 3 layer construction is highly waterproof and breathable (30K HH and 20K MVTR) keeping you dry in the wettest of conditions
  • 40 x 90 denier nylon outer fabric is exceptionally hardwearing for rough mountain use
  • Helmet-compatible hood is fully adjustable (side and rear adjusters) with a stiffened and wire peaked hood to protect the face
  • Water resistant Aquaguard Vislon main zip is protected by an internal storm flap and is two-way to accommodate harnesses
  • Cut to fit easily over multiple layers with pre-shaped arms to avoid riding up when reaching for holds
  • Map-sized main pockets and an external chest pocket with water resistant YKK Aquaguard zips, plus an internal chest pocket
  • Side vents with inverted zips are easy to open, give access to mid layer pockets, and are placed to sit above hip belts and harnesses, as are the main pockets
  • Gusseted cuffs fit easily over or under gloves and are secured with anti-snag Velcro adjusters
  • Hem adjusters are placed within the main pockets to avoid catching
  • 3 Year Alpine Bond

Vital stats




Hydrostatic Head: 30,000mm
MVTR: 20,000 g/sqm/24hrs


145 gsm 3 layer fabric
Outer Fabric: 40D x 90D Nylon
Membrane: Bi-component PU/PTFE membrane
Inner Fabric: 20D Nylon tricot
Zips: YKK Aquaguard DWR: PFOA Free C6


10: 465g

Origin: China

Care & Environmental Advice

Product Care Information

The better you look after this jacket, the better (and longer) it’ll look after you. Well, when we say ‘look after you’... it’s not gonna make you cups of tea or bring you breakfast in bed, but it will keep you nice n’ dry. And the good news is: it’s dead easy to do. 1) After you’ve finished going nice places and doing good things, treat your jacket to a wash at 30°C with either a dedicated Tech Wash (like Grangers and Nikwax) or pure soap. This keeps your jacket breathable by stopping the Durable Water Repellent (DWR) coating from getting clogged up with dirt and skin oils. No one likes a sweaty, clammy jacket. 2) If it’s stopped beading (rain soaking in rather than forming droplets), you can reactivate the factory-applied DWR by sticking it in the tumble drier on a low setting or applying a cool iron to it (under a tea towel). 3) To keep your jacket beading, you’ll probably need to top up the DWR once or twice a year using a Grangers or Nikwax re-proofer. You can find out more about why this is important here. If you’re still a bit unsure about washing your jacket, you can also take it/send it to our Ambleside store’s waterproof washing service and we’ll sort it all out for you.

Environmental considerations

We treat all our waterproofs with PFOA-free DWRs, cutting out some pretty nasty chemicals. Unlike our insulation and sleeping bag ranges, our waterproofs are not yet PFC-free. We’re still looking for a PFC-free DWR that’ll provide the same long-lasting performance for waterproofs, but we are working on it!

We make gear you’ll love for longer: gear that lasts; gear you’ll use, repair, re-use and pass onto someone else when you’ve finished with it. That’s why all our products have a three-year Alpine Bond warranty as minimum. We’ve always thought that the most environmentally friendly product we can make is the one that gets used the most and lasts the longest. So that’s what we do - it’s pretty simple really.

Size Guide
Women's waterproof jacket sizing chart
8 10 12 14 16 18
Chest (inches) 32" 34" 36" 38" 40" 42"
Waist (inches) 25.5" 27" 29" 31" 33" 35"
Hips (inches) 35" 37" 39" 41" 43" 45"
Chest (cms) 81 86 91 97 102 107
Waist (cms) 65 69 74 79 84 89
Hips (cms) 89 94 99 104 109 114
EU 36 38 40 42 44 46
USA 4 6 8 10 12 14
This size chart indicates the body measurements our garments are designed to fit. Measure yourself as described below, and use the size chart to find your size.
Chest: measure around your chest at the widest part. The tape measure should pass under your arms, and be level from front to back.
Waist: measure around your waist at the narrowest part.
Hips: standing with your feet together, measure around your hips at the widest part.
OM Reviews 2016/17 New Product

immediately impressive

Outdoors Magic Definition Review

Alpkit’s full-on mountaineering shell, the Definition is reassuringly burly but properly refined – think James Bond reincarnated as a waterproof jacket. And the price is fantastic.

UKC reviews Definition

Definition screams good design


The Details

Definition in action