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Gourdon 20waterproof back pack

Versatile 20 litre roll top drybag with elasticated straps and two mesh pockets for added capacity, Gourdon can be used for anything from adventure races to the daily commute


Gourdon 20 waterproof back pack

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Simple is a complicated design brief. Just a drybag with straps?

We made Gourdon durable and waterproof because we wanted a go anywhere rucksack and our customers have really taken this to heart. Gourdon 20 has been used at over 6000m, taken part in adventure races and seen a lot of canoe journeys. Some people have even used it to just walk round the park with the dog.

As a day bag Gourdon 20 is the perfect volume - it swallows a big lunch, waterproofs, jumper and space for all those little things. The single roll top opening keeps everything inside dry and secure - more than any other rucksack we’ve tried.

Gourdon gets used day after day; it has a removable stiff back pad, comfy foam mesh padded straps, a waist belt and chest straps. Wear it all weekend; biking one day, on the hill the next and commute to work on Monday.

Not content with Gourdon being an extremely versatile bag already, we added mesh pockets for easy access to your water bottle and snacks on the go. Elasticated straps let you attach anything you want on the outside - from a wet waterproof to little Tommy’s cuddly dinosaur toy.

Key features
  • Pouch for 1 l - 1.5 l hydration unit (450 mm long by 200 mm wide bladder)
  • Roll-top waterproof closure
  • Removeable padded back
  • Taped waterproof seams
  • Duraflex buckle and toggle closure
  • Twin mesh side pocket (will fit std cycle water bottle and smaller Siggs)
  • Elasticated accessory cord
  • Weight: 450 g
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Vital stats

Minimum weight: 404 g
Removable back insert: 72 g
Height (layed flat): 50 cm
Width (layed flat): 32 cm

Origin: China

Same day despatch

All orders received before 2pm despatched same day.

Free UK Shipping on all orders

Free 2 day delivery to UK addresses is included in all orders so the price you see is the price you pay. Upgrade to next day at the checkout.

Free No hassle 123 Day Returns

Buy with confidence and if you are not happy, change your mind or want a swap for any reason then return it for free and we will exchange or refund no question. The price you see is the price you pay. Just return the kit as you receive it - in its original condition, unused, unworn, with original packaging and fit for resale.


We offer a range of finance options from 0% to 9.9% starting on orders over £500. Please give us a call on 01773 417007 to apply for finance. Our customer support heros will take your order and talk you through the quick and easy application process.

Alpine Bond

If one of our products does not meet your expectations upon delivery or, if it does not live up to the demands placed upon it, please return it within 3 years of purchase for repair, replacement or refund. If the problem is our fault then we will do this to your satisfaction if it’s your fault then we will help out the best we can.
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18 Reviews


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Mike L
Excellent bag

Bought this pack 4 years ago, to use for daily bike commute.

Its light, comfortable and surprisingly spacious and endured all manner of weather conditions in those 4 years with aplomb.
It has been completely waterproof and the material is very flexible unlike the usual tarp type roll top bags seen.

The mesh pockets are handy and being deep have no worries about items coming out whilst walking or riding.

Was fortunate enough to get one of these in a bright fluro yellow for £25. Massive bargain.

Apart from some colour fading, the rest of the bag is still in great condition. When mine wears out will definitely get another.

Only drawback is the lack of brighter colour options.
Bring back orange and yellow fluro!

Great product and service!

Put my order for a 13l tapered dry bag, a gourdon 20 backpack and koala straps last saturday and received the items this wednesday (even with a personal note!).

First of all great service!

Second, the backpack looks and feels amazingly good!!!!!!
I have tried to attach the drybag on my bike, but it is a little bit moving around. I will look for further solutions and if that will not work out, I will certainly order the Koala!

Third, I will certainly will buy more Alpkit items in the future!

For the money, unbeatable.

Had mine for about 3 years, use it regularly, not at all careful with it and it's as good as the day I bought it. It has been carry-on luggage, a shopping bag for bike trips and a pannier top dry bag so far. Planning on DIY vertical bar bag harness made from tipped forward aero bars and this will be the first thing I strap to it.
The side mesh pockets hold all sorts of things and can be reached around to without taking it off and the stretchy cord will comfortably look after my bike helmet.
Wouldn't be without it. Me and Gourdon, we're mates!

Gordon 20

Got 2 of these backpacks used for everything bike walk beach day pack keeps everything dry does the job without any let down

Phil Luminous
My everyday carry.

I bought this little wonder on the off chance after seeing one or two at the Kendal Mountain Festi. thought it looked like a nice option for when I need a waterproof bag. Nothing too large or awkward and it's become my go-to daily!

It's super tough and beautifully finished and holds a lot more than I expected. I live and work as a solopreneur in London and will often carry around a 13" MacBook Air, notebook, warm layer, along with cables etc and that all fit's beautifully in there with room to spare. That coupled with the knowledge that my goodies will stay dry in amongst the frequent showers makes this a winner for me.

Also wonderful for a camera equipment carry-there's no padding beyond that which sits on my back-which is very comfortable by the way, so as long as cameras and lenses are in cases and padded layers, I can throw them in here knowing they'll stay dry and and have super easy access due to the large roll top aperture.

Mesh side pockets are great for my Sigg bottle and a beanie

All in all very happy with this wonderful little bag.

Peter Urwin

Great little bag. The exterior pockets are a perfect fit for the typical sigg water bottle. The fabric used is very tough so you needn't be overprotective of the bag. The shoulder buckle did break on me and alpkit sent me a new one free of charge. This is typical of alpkit's customer service and is one of the main reasons why I keep buying their stuff! The only addition I would like to see is a small interior pocket for a wallet, phone and keys, hence the 4* rather than 5*

It is just so good

I love this bag, I have a 20l and a 25l - they really are multi use. The simple design made it perfect to bungee onto my pannier and it got from John O Groats to lands end with the contents perfectly dry. When not on an adventure I use it as a shopping bag - it fits lots in and is comfortable to carry. The woman on the checkout noticed it when I was shopping today and asked where it came from. A top backpack.

Best 20l backpack of all time

Been using this to commute on my bike every day for a few months now and can't fault it. Big enough for a change of clothes, tools, lock, lunch and other bits you might pick up throughout the day -- I find it's bigger than the advertised 20 litres at capacity. I keep keys / lights / gloves in the side pockets; my previous commuting backpack was one massive cavern so it's good to have these things easily accessible, and so far nothing's ever fallen out of them.

I have used the outside cord to attach a smaller backpack to this while travelling, as well as extra clothes and it works very well. Secure.

As for the waterproof properties, well, yep, 100% waterproof for a 40 minute commute.

It's also very comfy, I like the thin waist strap and the padded back means that my lock doesn't dig into my back. The only small criticism is that it can leave your back a bit sweaty in hot weather, but this isn't a problem as I change my clothes when I arrive at work.

If mine ever dies I will be replacing it with exactly the same product. That's how good it is.

Incredibly good

I've been a user of Alpkit products since pretty much day one. They continue to deliver remarkably well produced goods at remarkable prices. This was my latest purchase and it feels ultra robust as well as looking good. It's so far been used for a daily cycle commute but will be tested on a recce of the Langdale fel race this weekend. I'd sincerely love it if the company could develop a race vest or modified version of this for the demands of long fell races and mountain marathons; the current back area would need to be developed. Bring it on folks!

Great bag!

I love this pack. I've had it for years and taken it everywhere. It has so far remained waterproof and is perfect for anything from shopping to kayaking!
If I was being picky, the things I would like are a small pocket inside so I can find my keys, and a better waste strap, especially if it had a small pocket too.
Altogether though, at this price, you can't go wrong. (Also wish the bigger sizes had the features of this one.)