More than just a sandwich bag: impressive performance and neat touches for smartphone users

The range of aLOKSAK waterproof pouches are made by LOKSAK Inc in the USA and they say that they are the only completely waterproof, dust proof and humidity proof storage bags on the consumer market. Bold claims indeed but after some impressive performance in the wettest January since time began I think the humble sandwich bag has met its match.

There is a decent selection of sizes in the aLOKSAK range for whatever you'll be wanting to protect. We've got the 86 x 162mm (76 x 140mm internal) size, which is marketed as great for smartphones. Nine quid gets you a pack of three polythene bags with a hermetic seal tested and certified waterproof to 60m (200ft). Using a medical grade film they are also certified in the US to be safe as food storage.

The aLOKSAK has lived in my jersey pocket on every ride over the last five weeks and has performed brilliantly in terms of keeping the rain and road spray out even on a couple of days when I risked just a windproof jersey before getting drowned in a monsoon. The bonus over any sandwich bag here though is that you don't get any condensation inside when it's sitting between a wet outer layer and your warm body. This also works on dry warm rides when sweat transfers through your jersey onto your phone.

The bag works with touchscreens, so you can use your phone while it's sealed away from the elements and even taking calls through the bag seemed to work fine. GPS signals weren't affected either if you use your phone for mapping or Strava style apps.

I use a Samsung Galaxy Fame and this fitted spot on in the aLOKSAK. There is a bit of spare room for the bigger screened phones, S3 for example. I usually carried phone, cash card, cash, a few business cards and a front door key which filled the bag without stretching it. It has got a small amount of flex and give in the material should you need to pack some more things in there though and the sharp edges of the key haven't punctured the film.

The packaging says that the aLOKSAK remains flexible down to -40°C which thankfully I haven't had to test but as we've had very few freezing days here in the UK a quick overnight kitchen freezer test certainly didn't highlight any durability issues with the material. It wasn't quite as flexible as at room temperature but nothing of any concern.

On the whole I think the aLOKSAK is a worthy investment, especially at £3 a bag. After a month of daily use it's lost some of the logos and has gained a couple of blemishes and scuffs to the material but it's still just as tight as it was when it came out of the packet. Sealing is easy with just a drag of your finger and thumb and even applying my bodyweight by standing on it couldn't make the seal pop open. I'll happily be using the aLOKSAK on every ride throughout the year.


More than just a sandwich bag: impressive performance and neat touches for smartphone users.

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road.cc test report

Make and model: Loksak aLoksak

Size tested: 3 units in a pack

Tell us what the product is for, and who it's aimed at. What do the manufacturers say about it? How does that compare to your own feelings about it?

Originally designed for diving there is now a range of sizes and styles of LOKSAK pouches all offering waterproof, dust-proof and humidity-proof performance. The aLOKSAK we've tested never failed once.

Tell us some more about the technical aspects of the product?

100% Polythene construction that remains pliable to -40 deg Celsius.

Hermetic seal

Water, Dust & Humidity proof and airtight

Waterproof to 60m

Medical grade film makes it safe for food storage

Rate the product for quality of construction:
Rate the product for performance:
Rate the product for durability:
Rate the product for weight, if applicable:
Rate the product for value:

Tell us how the product performed overall when used for its designed purpose

It worked very well keeping everything out that it should. The pressure required to get the seal to fail is impressive.

Tell us what you particularly liked about the product

It carried everything I needed, was a good size and performed as it said it would.

Tell us what you particularly disliked about the product

It's looking a bit scuffed and scratched after just a month but to be fair it's not affecting performance.

Did you enjoy using the product? Yes.

Would you consider buying the product? Yes.

Would you recommend the product to a friend? Yes.

Overall rating: 8/10

About the tester

Age: 35  Height: 180cm  Weight: 76kg

I usually ride: Whatever needs testing or Genesis Flyer, fixed of course!  My best bike is: Kinesis T2 with full Centaur Red

I've been riding for: 10-20 years  I ride: Every day  I would class myself as: Expert

I regularly do the following types of riding: time trialling, commuting, club rides, sportives, fixed/singlespeed,


Stu knocked out his first road.cc review back in 2009 and since then he's chucked the best part of seventy test bikes around the West Country, a couple of them quite literally! With three alloy and two steel bikes in his fleet he's definitely a metal man (that'll be the engineering background) but is slowly warming to that modern carbon fibre stuff along with fat tyres & disc brakes.
It's not all nostalgia though, after spending the last few years in product design Stu keeps banging on about how 3D printing is going to be the next big thing and he's a sucker for a beautiful paint job too.


Martin Thomas [384 posts] 5 years ago

You carry business cards on a ride? I don't know whether to be impressed or appalled.  1

andyp [1599 posts] 5 years ago

You carry a mobile phone on a ride? I don't know whether to be impressed or appalled.  1

justDave [40 posts] 5 years ago


monkeytrousers [134 posts] 5 years ago

I thought Strava was waterproof already.

stuke [334 posts] 5 years ago
Martin Thomas wrote:

You carry business cards on a ride? I don't know whether to be impressed or appalled.  1

they have my name, address and phone number on. Ideal for quick swap of details, witness, insurance that sort of thing.

levermonkey [702 posts] 5 years ago

Waterproof to 60m - I think my phone being trashed is the least of my problems if this is an issue whilst riding.

I have used small freezer bags for years and have never had an issue with damp tech. Also, for £9 I can get an awful lot of freezer bags.

If my commute is really wet I just double-bag.

amawby [90 posts] 5 years ago

Those pointy corners look perfect for catching on your jersey and pulling threads when you slide it into a pocket.
Also, the claim about being the only ones on the market - what about: http://jerseybin.com/