RAINSMORE 40L Foldable Hiking Backpack (Water Resistant) – Black & Grey
Product description
At a glance
A 40L hiking backpack that’s designed to be both practical on short trips and easy to live with when you’re not using it. On paper, the big draw is the mix of organised storage (multiple pockets, plus a waterproof pocket) and a foldable design that can be tucked away compactly. The idea is that you can pack for walking days, camping basics, or even a short travel stint without your kit turning into a single, damp lump.
It’s also the kind of rucksack where the details matter: a dedicated shoe compartment at the base, elastic straps on the front for quick access to items like a layer or trekking pole storage, and reflective tape for visibility at night. Not everything will suit every style of load-carrying, but for many walkers it lands in the “good-enough structure” territory rather than feeling bare-bones.
The essentials
If you’re looking for a foldable hiking backpack, the RAINSMORE 40L stands out for how it approaches organisation and weather concerns. The main compartment is meant for short trips, while several slip pockets help keep smaller items from disappearing. There’s also a waterproof pocket intended for damp clothing and towels, aiming to stop moisture transferring to the rest of your gear.

There’s a separate shoe compartment at the bottom, which can be genuinely useful when you’ve finished a hike and want to swap into regular footwear without dragging mud and grime through the rest of your bag. For day-to-day outdoors use, that’s a sensible feature.
One practical note: with a 40L capacity, it will feel most at home when you actually pack it for longer day outings or weekend-style trips. If you only carry essentials—water, a snack, and a light layer—you may find it more bulky than a smaller rucksack.
Key takeaways
What stands out in use


You get a comfortable carry approach via adjustable breathable mesh shoulder straps, plus an adjustable chest strap for stabilising the load. There’s even a whistle carabiner attached, which is the sort of safety add-on that doesn’t add much hassle, but could matter in the right situation.

The front reflective tape is also a clear, low-effort safety detail, especially if your walks run into darker evenings.
Where it may not be perfect
This is described as tear-resistant waterproof material with reinforced stress points and premium SBS zips, which sounds reassuring for durability. Still, “water resistant” doesn’t mean the same thing as being fully submersible in all conditions—so if you expect heavy rain for hours, it’s worth being realistic about what you’re asking from a foldable backpack.
Tech specs
- Name: RAINSMORE Hiking Backpack 40L Foldable Lightweight Rucksack
- Type: Hiking / trekking backpack (water resistant)
- Size (fully extended): 32 × 23 × 53 cm
- Weight: 0.74 kg
- Folded dimensions: 24 × 24 cm
- Capacity: 40L
- Colour: Black and Grey
- Material: Tear-resistant waterproof fabric
- Closure: SBS zips (premium SBS zips mentioned)

Who it’s for
This backpack suits people who want a straightforward 40L outdoor rucksack with more internal separation than a plain “one big compartment” bag. If you like having a place for damp items (via the waterproof pocket) and you regularly change footwear after walking, the shoe compartment is a big plus.
It also makes sense if you’ve got limited storage at home. Since it folds down to a compact size, it’s easier to store away without taking over a whole shelf.


It may be a weaker match if you tend to pack very heavy loads or you’re after a highly technical, expedition-style harness system. The comfort features mentioned (mesh straps and chest strap) help, but it’s more “walk-ready” than “extreme carry” based on the information given.
Best use cases

A typical micro-scenario: you’re heading out for a hike, bringing a spare layer and maybe a towel. You can stow the wet item in the waterproof pocket, use the elastic front straps for quick grab access, and keep shoes separate in the bottom compartment. After the walk, you swap into trainers or boots you’ve brought along, and your main compartment stays cleaner.
It should also work for short camping basics or climbing trips where you need organised storage more than anything else.
Is it worth it?
You should buy this RAINSMORE 40L backpack if you want a water resistant foldable rucksack for short trips that prioritises organisation (multiple pockets, waterproof pocket for damp items, and a dedicated shoe compartment). It’s also a sensible pick if you value lightness and compact storage for when it’s not in use.
You may want to skip it if you’re expecting fully waterproof performance in prolonged downpours, or if you’re carrying extremely heavy loads and want a more specialised load-carrying setup than what’s described here.

Worth considering if you’re browsing for a practical, no-nonsense hiking backpack that covers the day-to-day realities of outdoor walking—wet gear, muddy shoes, and quick access.
Quick overview FAQ


Is it actually foldable when you’re not using it?
Yes. It folds when not in use, with dimensions listed for the folded state.
Does it have a way to keep damp items from spreading moisture?

It includes a waterproof pocket intended for storing damp clothing and towels separately.
Where do the shoes go?
There’s a dedicated shoe compartment at the base.
How heavy is the backpack?
It weighs 0.74kg, which is fairly light for a 40L pack.
What does “water resistant” mean here?
The material is described as tear-resistant waterproof fabric, but it’s positioned as water resistant—so it’s best for typical outdoor weather and damp items, not as a guarantee for being fully submersible.
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