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Black WATERFLY Hiking Backpack 20L with a Nalgene bottle in its side pocket, on a tree stump in a forest on the Veluwe
Gear Review

WATERFLY Hiking Backpack 20L review: light, comfortable and full of pockets

WATERFLY Hiking Backpack 20L Daypack Published September 2026
Ray Kootstra
Ray Kootstra
Founder of HikeLoad · long-distance hiker
Disclosure: WATERFLY sent me the WATERFLY Hiking Backpack 20L free of charge for this review. They had no say in what I wrote and didn't see this review before it went live. My review policy
9
out of 10
The verdict

A light, really comfortable daypack with storage for everything. On my first hike it was really pleasant to carry and felt especially light: soft shoulder straps, a chest strap that gives as you breathe, and a hip belt that sat really well. The one thing I'd change is the stiff hip-belt adjustment.

Great for: Day hikes in the woods or the hills, and a carry-on or commute bag in between. Anyone who likes a pocket for everything.
Skip it if: You need more than 20 litres, or you often re-tighten your hip belt on the move: the adjustment is stiff.
On my scale
620g
Brand's claim
620g
Difference
0g
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What I liked
  • Really pleasant to carry, and it feels light on your back
  • Wonderfully soft shoulder straps
  • Chest strap with a bungee section that gives as you breathe
  • Cross-style hip belt that sits really well and doesn't dig in
  • No sweaty back on a sunny 23 °C day
  • Lots of storage: two stretch bottle pockets, a deep front pocket and plenty of pockets inside
  • 620 g on my scale, exactly what WATERFLY claims
What could be better
  • The hip-belt adjustment is very stiff: the webbing drags through the buckle, so tightening it takes more effort than it should
How I tested it
Hike
One 9 km forest loop on the Veluwe (Netherlands), 26 September 2026
Weather
Sunny, 23 °C
In the pack
1.5 L Nalgene, down jacket, two protein bars, sunglasses, cap, wallet and a hygiene kit
Not tested yet
Rain, long days, heavier loads, trekking poles, a hydration bladder on the trail and long-term wear. Dated updates will follow.

I unpacked the WATERFLY Hiking Backpack 20L at home, weighed it on my own scale, went through every pocket, and then took it on a 9 km forest loop on the Veluwe. That's one hike, so this is a first-hike review: what I can tell you after a real day out, and what I can't tell you yet.

First impressions

Out of the bag, the fabric feels genuinely robust. WATERFLY uses 600D polyester with 200D nylon, and you can feel it: it doesn't have that flimsy, papery feel you sometimes get at this price. The back padding is lovely and soft, the kind that already feels good before you've even set off.

On my own scale it came in at 620 g, exactly the weight WATERFLY lists. No rounding games, which I always appreciate.

The WATERFLY Hiking Backpack 20L still sealed in its plastic bag
Just arrived, still in its bag.
Front of the black WATERFLY 20L daypack laid flat, with its bungee cord and side straps
The front: bungee cord, compression straps and a deep zipped pocket.

On the trail

On 26 September I took it on a 9 km loop through the forest on the Veluwe. It was sunny and 23 °C. In the pack: a 1.5-litre Nalgene, a down jacket, two protein bars, sunglasses, a cap, my wallet and a hygiene kit with toilet paper and wet wipes.

It was really pleasant to carry, and what struck me most is how light it feels on your back. The shoulder straps are wonderfully soft, the chest strap was just as good as I expected with that section of bungee in it, and the hip belt sat really well.

It was really pleasant to carry, and above all, it feels light.

Despite the sun and 23 degrees, I didn't have a sweaty back. That's one warm day, not a whole summer, but it's a good first sign for the back panel.

WATERFLY 20L daypack standing on a tree stump in a forest on the Veluwe
On the Veluwe, 26 September 2026.
Padded back panel and shoulder straps of the WATERFLY 20L on a tree stump in the forest
The padded back panel: no sweaty back on a sunny 23 °C day.

Fit and comfort

Before the hike I expected the light padding on the shoulder and chest straps to stay comfortable with a load in the pack, and it did: the shoulder straps are wonderfully soft.

A detail I really like: the chest strap has a section of bungee built into it. Instead of clamping you shut, it gives a little as you breathe, so your chest can expand freely. It makes a genuine difference to how comfortable the pack feels.

The standout is the hip belt, which uses a cross-style construction I hadn't seen on a daypack before. It doesn't dig in, and it isn't over-long or bulky, which keeps the whole pack feeling light and tidy on your body. On the trail it sat really well.

Back of the WATERFLY 20L: padded mesh back panel, shoulder straps, chest strap with whistle and hip belt
Soft back padding, the chest strap with its whistle, and the hip belt.
The cross-style hip belt of the WATERFLY 20L worn over a white T-shirt
The cross-style hip belt: it doesn't dig in and it isn't bulky.

Storage and features

This is where the pack really earns its keep. For a daypack there's more than enough space, and there are storage options everywhere:

  • Two large stretch side pockets. My 1.5-litre Nalgene drops into either one with ease.
  • A front bungee cord for strapping an extra layer or wet gear to the outside, and side compression straps to cinch the load.
  • Trekking-pole attachment points on both sides.
  • Hydration ready: an internal sleeve for a bladder of up to 2 litres (not included) and a hose port.
  • A glasses holder on the shoulder strap.
  • Pockets everywhere: small pockets inside for loose bits, a zipped inner pocket for valuables, and a zipped front pocket on the outside that's pleasingly deep.
A Nalgene bottle in the stretch side pocket of the WATERFLY 20L
My 1.5 L Nalgene drops straight into the stretch side pocket.
Trekking-pole attachment with a webbing loop, bungee cord and cord lock on the WATERFLY 20L
One of the trekking-pole attachment points.
Open main compartment of the WATERFLY 20L with a down jacket and protein bars in an inner pocket
Down jacket in the main compartment, protein bars in one of the inner pockets.

Good to know: the padded main compartment doubles as a sleeve for a laptop up to 15.6", and the pack is carry-on size. So it works as a travel or commute bag too, not just on the trail.

Hydration hose port marked with an H2O drop at the top of the back panel
The hose port for a hydration bladder, just below the grab handle.
Elastic glasses holder with a glasses icon on the shoulder strap
The glasses holder on the shoulder strap.

The niggle: a stiff hip-belt adjustment

Nothing is perfect. The hip belt is fiddly to tighten from the front: the webbing moves stiffly through the buckle, so cinching it takes more effort than it should. On this hike it didn't bother me, but it's the reason this pack gets a 9 and not a 10, and it's the one thing I'd like WATERFLY to smooth out.

What I haven't tested yet

One hike on a dry, sunny day doesn't tell you everything. I haven't had this pack out in the rain, so I can't tell you yet how the water-resistant fabric holds up. I haven't carried trekking poles on it or used a hydration bladder on the trail either, and long days, heavier loads and long-term wear are still to come. I'll add dated updates to this review as I use it more.

Value and warranty

On features, this pack punches well above its price. WATERFLY also backs it well: every WATERFLY bag comes with a three-year warranty, extended to ten years free of charge when you register it at waterflyshop.com, whether you bought it there or on Amazon.

Who it's for

It's well suited to day hikes in the woods, light enough for days in the hills or mountains, and versatile enough to double as a travel or commute bag. After my first hike I'd give it a 9 out of 10. I'll keep using it and update this review as the kilometres add up.

How the weight compares

The WATERFLY Hiking Backpack 20L as weighed on my own scale, next to similar gear from HikeLoad's gear weight database (manufacturer specs).

WATERFLY Hiking Backpack 20L · weighed by me
620g

Specs

Capacity 20 L
Weight 620 g on my scale (WATERFLY claims 620 g / 1.37 lb)
Dimensions 48 × 27 × 16 cm (18.9 × 10.8 × 6.5 in), carry-on size
Material 600D polyester and 200D nylon, water-resistant
Hydration Internal sleeve for a bladder up to 2 L (not included) and a hose port
Laptop Padded sleeve for up to 15.6"
Harness Padded shoulder straps, chest strap with a bungee section and safety whistle, cross-style padded hip belt
Carrying extras Two stretch side pockets, front bungee, side compression straps, trekking-pole attachments on both sides, glasses holder
Zips Two-way SBS zips with pull rings
Colours Black, blue, grey
Warranty 3 years; 10 years free when you register it at waterflyshop.com, also if you bought it on Amazon

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