Waterfly Ultra Lightweight Foldable Backpack (20L) – packable daypack for hiking, travel & camping
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Product description
What it is (and why you’d want a packable 20L)
The Waterfly Ultra Lightweight Foldable Backpack is a compact, 20L daypack built around a simple idea: you can take it with you, fold it away when you don’t need it, then unfold it quickly for the next trip, walk or day out. It’s the kind of bag that suits the “just in case” moments too—think a lightweight extra layer of storage for commuting days, travelling with hand luggage, or heading out for hiking and camping where you want something basic but practical.
On paper, it’s designed for everyday items and quick access. The main compartment is set up to take an A4 book, and it can fit an iPad as well. That makes it feel less like a hardcore hiking pack and more like a flexible daypack that covers travel, sport and outdoor weekends without being bulky.
The essentials: storage layout that’s meant for real life
Where this bag stands out is the compartment layout. You get a main compartment plus front storage areas with two different opening options.
- Front pocket 1 is positioned for small essentials—based on the description, that’s where you’d keep keys, cards, headphones and even a lipstick.
- Front pocket 2 uses a combination of a fastening tape and a zip, with what sounds like two ways to access the contents quickly (either zip or the tape). If you’ve ever used a “one pocket too many” bag and then ended up digging around for cables and chargers, this approach is clearly trying to reduce that hassle.

The main compartment itself is described as roomy enough for an iPad and an A4 book, so if you carry tablets, documents or a small folder, it’s a sensible fit.
Worth noting: a 20L packable bag will always feel more “carry-on sized” than “full day trek gear”. If your plan is heavy, wet or bulky kit, you may find it a bit tight.
Ultra-light and packable: what you’ll notice day to day
The headline weight is 280 g. That’s light enough that you’re unlikely to resent carrying it as a backup bag.


The bag folds up into its own pocket for storage, then unfolds when you need it. In practice, that kind of design is handy when you’re packing for travel: you can keep it flattened in your suitcase or day bag and deploy it at the destination for shopping, a longer walk, or carrying a spare layer.
One small limitation to keep in mind: ultra-light bags are usually more about convenience than rugged expedition use. This one is positioned as a lightweight daypack, so if you expect to treat it like a heavy-duty rucksack, you might want to look at stronger, more structured alternatives.

Water and tear resistance (and how it affects your choices)
The description says the backpack is made from durable nylon fabric that’s water-resistant and tear-resistant, plus it’s described as easy to clean and anti-abrasion. For UK weather—and those sudden drizzle moments—this matters.
It’s probably not going to replace a proper rain cover if you’re out in sustained downpours, but it does sound like it’s meant to handle the everyday outdoors risks: light rain, splashes, and general wear and scuffing.
Also, “easy to clean” is one of those features that sounds minor until you actually need it. If you’re using the bag for sport or camping and you expect it to pick up dirt, the material choice is a good sign.
Comfort and carry: breathable straps and weight distribution
Comfort is addressed with mesh breathable shoulder straps, which should help if you’re wearing it for a while.

There’s also mention of a side buckle intended to help distribute weight and keep the bag stable and centred. That’s a practical detail. A packable daypack can sometimes flop around, especially when loaded unevenly, so a stabilising element is a useful addition.
Who it suits (and who should skip it)


It makes sense if you want a compact 20L rucksack for day trips—hiking, camping weekends, sports outings, and travel—where you don’t want something heavy or cumbersome.
You’re likely to like it if you value a bag that: - fits everyday essentials and small valuables in the front pockets - carries an A4 book and an iPad in the main compartment - folds away easily thanks to the packable design
You may want to skip it if you need a fully structured backpack for very heavy loads, or if you’re expecting to carry lots of bulky hiking equipment. With a packable ultra-light build, it’ll generally stay more in the practical, everyday bracket than the “long-haul, heavy-duty” bracket.
Getting the most from it: practical use scenarios

A common way this kind of packable daypack gets used is as a travel “top-up” bag. For example, you could unfold it when you arrive, then use the front pocket 1 for your cards, keys and headphones, while keeping a small book or tablet in the main compartment. When you’re done—say, after a day of walking around—you fold it back into its own pocket and stash it again.
It’s also a decent pick for a light hike where you want to keep small items organised without bringing a full-size rucksack.
Tech specs
- Name: Waterfly Ultra Lightweight Foldable Backpack (20L)
- Type: Foldable packable rucksack/daypack
- Capacity: 20L
- Weight: 280 g
- Material: Tear-resistant and water-resistant nylon fabric
- Colour: Not specified in the provided details
- Size/Dimensions: Not specified in the provided details
- Compatibility: Main compartment can accommodate iPad and A4 book (based on description)
Final verdict
Is it worth it?



If you’re after a light, packable daypack with sensible front-pocket access and a main compartment that can handle an iPad and A4 materials, the Waterfly Ultra Lightweight Foldable Backpack is the sort of bag that can genuinely earn its space in your luggage or kit bag. The 280 g weight and foldable design are the standout reasons to buy.
However, it may not be the best choice if your outings involve heavy, bulky loads or you want a strongly structured rucksack for demanding terrain. It’s better treated as a convenient, lightweight carry option for everyday essentials and lighter outdoor use.
Mini FAQ
Can it hold A4 documents and an iPad?
Yes—according to the description, the main compartment can accommodate an iPad and an A4 book.
Is it suitable for light rain?

It’s described as water-resistant and tear-resistant with nylon fabric, which should help with drizzle and splashes, though nothing here suggests it’s fully waterproof.
How heavy is it?
It’s listed as 280 g, which is one of the key reasons it works as a packable backup daypack.
What’s the point of the two front pockets?
One is for small essentials, and the other has a dual opening approach (tape and zip) for quick access to smaller items.
Where would you typically use it?
The description points to sports, hiking, camping and travel—so it’s a practical choice when you want a lightweight bag rather than a heavy, feature-rich pack.
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