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Airlok Tapered 13ldry Bag

Tapered dry bag with sewn in webbing strap and attachment strap

Airlok tapered bikepacking watertight dry bag 13 litre kelp - green

Airlok Tapered 13l dry Bag

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Fully taped roll-top dry bag which is shaped to fit into tapered spaces, such as our Koala seat pack or a kayak bulkhead.

Just like the rest of the Airlok XTra range there are attachment points either side of the bag. Extra utility comes from the sewn-in webbing strap which extends around the length of the bag opening up a multitude of additional attachment opportunities.

Note: This Airlok will fit perfectly inside one of our Koala seat packs. If you want the lightest possible set up it is also possible to attach it directly to the seat post as a lightweight saddle bag. However be aware of its limitations: sitting underneath your seat it will be exposed to constant abrasion, mud and grit which may eventually wear holes in the fabric. Other options include systems such as the WildCat Tiger padded harness.

Key features
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Vital stats

Fabric: 320D TPU Taslan Nylon
Buckles: 20 mm Duraflex Stealth


Weight: 148 g
Flat length: 55 cm
Flat width: 28.5 cm
Packed size: ⌀ 18 x 39 cm

Origin: China

Commonly used applications include: Fits inside a Koala seat pack (ideal for bikepacking adventures) Inside a kayak or open canoe

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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9 Reviews


Used this product?

Write a review
Awesome lite low cost option, recommend

Was doing a 1000k Bikepacking Event in New Zealand, had a bigger seat bag but wanted to go smaller, lighter = faster. Know this isnt really promoted to have heavy use by itself but used it for the event and worked awesomely! Did leak a little but that was after 10hrs riding in the wet and by the end of the event did have a small tear on the daisy chain loop where sat between the seat rails but considering the use i'm happy. Will get it repaired and think will just run an extra webbing loop around the bag and seat rails but not the daisy chain just to give it a bit of extra support for next years 1100k mission. Oh yeah, i used it for training missions beforehand.

Definitely fit for purpose!

I rode from Ireland to Cornwall with this bag and had no problems. I used a velcro strap to attach to the seat post and two straps, one to the top of the seat post and the other under the saddle rails....didn't budge and inch over a few hundred miles. Usual great built quality you expect from Alpkit....well done.

Great products 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!


Have used this a lot. the webbing loops provide multiple anchorage points. It fits neatly to upper frame, seatpost and seat without sticking out backwards too far which really limits any wobbling. It is waterproof, well sewn and the fabric is tough enough without being made out of truck curtains like much more expensive Ortlieb bags. What's not to like?
I use 4 velcro straps and a webbing strap with clip and leave it on my bike when camping as it can be accessed and re-stuffed without removing it.
Please make something rubbish, I love a good moan!

Review update

I have used this product on two bike rides as a seat bag to test it and it works amazingly well!

I have added two velcro straps (€3,-) because they are more easy to compress the bag as the deliverd straps.
The bag held on extremely well and there is really no wobling around, It is completely sturdy.

Beside this is a good dry bag, it will also work damn fine as a light weight (or cheap) seat bag!

Great value

Amazing piece of kit for the price. I used whilst doing the Cairngorm Loop over 4 days. My recommendation is to get an extra strap or 2 to help eliminate the wobbles and to keep it wedge shaped just under the saddle.


This item needs simple manual. Attached picture is the best way to fit.

Mike S
Not fit for purpose

If you want a 'lightweight luggage solution' as the picture states don't waste your money on the airlok. I have yet to find a way to attach this bag to my bike in a way that is satisfactory. I have tried adding velcro straps, zip ties and bungees but all fail to stop the bag moving around. If you attach it to your bike as Alpkit have suggested the movement and instability is simply laughable. I think someone at Alpkit needs to reword the blurb on this bag and remove the misleading photos. Quite simply I now have two unwanted drybags and am £42 poorer for it!

How to I fit this?

I can't fathom out how to securely fasten this thing. Seems like "bikepacking" is a fashionable faff - panniers would be so much easier.