Our site works best with JavaScript enabled.

Gourdon 20 waterproof back pack

Waterproof 20 litre roll-top drybag with bungee straps and mesh pockets for added capacity, ideal for anything from adventure races to the daily commute.

Alpkit Gourdon 20 day sack in black
  • Google+



  • Black - Alpkit Gourdon 20 day sack in black
  • Chilli - Alpkit Gourdon 20 day rucksack in red
1. Select Colour

Please select a colour. If your desired colour is not available, you can request a Stock Alert and you will be emailed when the product is either back in-stock or on pre-order.

In Stock
In Stock
In Stock
In Stock
In Stock
In Stock

Please choose an option above

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
  • 3 Year Alpine Bond
  • Pouch for 1 l - 1.5 l hydration unit (450 mm long by 200 mm wide bladder)
  • Twin mesh side pocket fit std cycle water bottle and smaller Siggs
  • Roll-top waterproof closure
  • Removeable padded back
  • Elasticated accessory cord
More images
Vital stats

Fabric: Taslan TPU nylon
Taped waterproof seams
Duraflex buckles


Total weight: 470 g
Removable back insert: 72 g
Height (laid flat): 50 cm
Width (laid flat): 32 cm

Origin: China

Product Support Team Advice

Related products

Airlok 8l

Lightweight 8 litre drybag


Airlok 13l

Lightweight 13 litre dry bag


Airlok Xtra 3l

3 litre drybag with attachment points


Airlok 4l

Lightweight 4 litre drybag


Gourdon 25

25 l drybag rucksack


Airlok Xtra 8l

8 litre drybag with attachment points and shoulder strap

What You Say: Customer Reviews and Comments

43 Reviews


Used this product?

Write a review
Versatile and trusty.

I've had my Gourdon for nearly 4 years and it's still as good as the day I got it. I've used it on my daily MTB commute for the last year and a half, it's never let a drop of rain in (it's even survived a few accidents). Before that I used it as my rucksack at University, carrying books and a laptop every day. Since day 1 it's also been used as a day sack in the mountains around the UK, a weekend bag and it's even been abroad a few times! These bags are so versatile and I trust it to keep my things dry every time. Everyone should own a Gourdon!


Nice job mates! Super fast shipping to the Czech republic!!! I love this pack. I will disseminate your cool brand here in central Europe:)


Easily the best bag I've ever bought, water tight, super light and comfortable, easy access, super durable. I've used this bag every day for the past 4 years, no rips, no snags, it just keep going.

Great bag

I bought this bag to use on my cycle to work, but ended up using it all the time. I just love it. Would love it even more if it had inside pouch or attachment hook.

Stephen Williams
Great Wee Bag

Really pleased with the bag, bought it to replace my cycling bag and it fill the need perfectly. While it doesn't have all the nice compartments of my last bag the large opening makes it easy enough to navigate the internals and find what you need.
We have also used it for walks as a family and it preforms well, my back gets a bit sweaty but thats to be expected from a day sack of this type.
The fact it's waterproof it great, my last bag would fail on the zip line needing either a dry bag inside our an outer cover, neither of which are a great solution.
This just works and at a great price! I hope Alpkit keep producing it incase mine ever gets damaged so I can get another.....

Every day

I've had this bag almost a year and have used it for commuting by bike year round, race day necessities, and carrying groceries. At 20l, it's small enough that it doesn't feel wasted when empty, and is surprisingly large when I need to carry extra gear. Best bag I've owned.

Festival staple

The Gourdon is at the top of my checklist for my yearly weekend pop festival - Indietracks. It is very lightweight and comfortable to wear, even for a short person (5' 4"). I love that I can chuck whatever I want in it without fearing the inevitable rain. Without it, I probably wouldn't risk taking my camera, and would have missed some fantastic shots over the years.

Tom Kennish
Best Rucksack, best customer support

Had a problem with the rod that the chest strap clips to. On our way back from Scotland we stopped off at the Ambleside store, walked back out with a replacement in 2 minutes. Awesome people.

Endee M
Gourdon Brown, Texture, Like Sun

Brilliant in every way. In fact, my better half has asked me not to keep going on about it's comfort, great design, good size, great waterproofing...
Props to the team in the Ambleside shop too, lovely bunch & very helpful.

Ideal back pack

I bought this back pack for a trip to the peaks. I need something more than your usual CamelBak. I had plenty of space for all my gear and carried a 1.5 litre bladder, great little touch having a pocket for that. It was really comfy throughout the ride and distributed the weight evenly. The only mod I made was to place a clip on the lower part of the shoulder strap to retain the drinking pipe for the bladder. Still rate the pack as a 5 star. Superb.

Jim L
Best cycling bag I've ever owned

Been using this for a year or two and it's without a doubt the best cycling bag I've owned.

100% waterproof. Bulletproof. Comfortable.

Never going back to the usual cycling hydration packs.

Buy one. You won't regret it!

Very Durable

I bought this pack to replace an old $10 backpack that survived five years of college. At first, I was hesitant about switching from a generic black backpack with tons of compartments to a flashy red pack with one chamber. Since making the switch, I haven't gone back. My favorite features are:
- waterproof roll top
- water bottle holders on both sides
- simplified storage
- super lightweight
- padded straps
- velcro compartment can fit a 2.5 L hydro pack

You just can't get a backpack this versatile, lightweight, and waterproof for such a small price tag. Everyone should have one of these.

You need this rucksack

Quick story:

I've owned a 22l rucksack from Osprey for 8 years. It's served me well on hundreds of commutes and numerous extended road trips.
Then I saw the Gourdon (two of my close friends both purchased one in the same month). I liked it, but I didn't need it.
Then someone bought me one for my birthday. Nice.

One short road bike commute (10 miles), one long road bike commute (50 miles) and one long run home (13 miles) and the Gourdon has shown itself to be light, comfortable, a great fit (I'm average build and 5'11) and as a bonus, it's a dry bag!!!
£32? Buy one. Buy your friends one. Buy you dog one. This rucksack is THE rucksack and you need one in your life.

Banana Hammock
Brilliant piece of kit

I use this all the time, from cycling in the rain, to wading through swamps, to going on diving trips through rough seas. Nothing has ever got wet inside it. It is comfortable and spacious. I even used it as bucket once, since it is obviously waterproof from the inside too. My mates are always jealous of it and ask me where I bought it. It's gone up in price since I bought it for 20 quid about 7 years ago, but it's still an amazing bargain.

I love Gourdon

I love this bag, perfect for day hikes in soggy Cornwall. I had a problem with the chest strap on my first one, but it was replaced by Alpkit with no quibbles. Apparently the materials for the chest straps has changed now, so hopefully there won't be any more problems. Top marks for the bag, and for customer service

Bomb proof!

Had one of these for 4 years, used on the daily cycle commute. Comfortable, keeps everything dry and looks great. Still going strong. Classic Alpkit

Apocalypse proof piece of kit

I've had a red Gourdon 20 for so long I can't actually recall how old it is but I'm sure it is 8+ yrs of fairly frequent use..apart from fading a bit over that time all the straps / elastics / clips still work perfectly - it is just starting to look shabby and a little leaky in extreme circumstances - like it's owner - but considering it's age and the abuse it's had (overloaded so I can hardly lift it, wet/dry/dust/mud/chucked about/beaches/towns ..walking+ cycling etc) I can't complain. It can hold an incredible amount of stuff, it's comfy - a bit sweaty on the back is the only criticism I can make - you can bungee a bike helmet / clothes whatever on the back plus the side pockets are so handy. I've just ordered a kelp replacement hoping it's as tough- I'll tell you when I order another in 8+yrs! For the price it's a no brainer. A simple, tough and versatile piece of kit. Very Highly recommended.


Brilliantly designed, simple, comfortable and insanely cheap. Useful for everything from shopping to fell walking. My favourite bag.

Marc Stapleford
Best Back pack Out There! #Hardcore

I have had my Gourdon 20 for 2 yrs now and its still going strong, best bag ever!

I mountain bike & hike in Snowdonia, Kayak in the Sea and lakes and the Gourdon has never let me down.. BEST EVER WELL DONE ALPKIT smile.

ps will be using it again for this weekend to compete in a 2 day mountain marathon in Snowdonia smile #bombproof

several years of good service

Barely weighs more than the drybag itself, can take a water bladder too, and straps at chest and waist help on more protracted duties. Had this ?circa 4-5 years now and still going strong, used as my daily work bag as well as any other excuse. Some fretting of the lightweight side pocket mesh, but my fault for keeping pens and mechanical pencils in them, and having them constantly overloaded. Just posting this review because I read that the new ryanair rules are to be for a max 20L cabin bag included in standard ticket price. I know what I'll be using. https://www.bbc.co.uk/news/business-45289432