RAINSMORE RM20101 18 L Hydration Backpack with 2 L Bladder

The RAINSMORE RM20101 is an 18-litre hydration backpack listed with a 2-litre bladder, insulated compartment and rain cover. Its multiple pockets, expandable bottom section and attachment webbing suit day outings where you want water and small gear in one pack.

At a glance

The listing describes a separate insulated bladder compartment and claims water stays cool for 4–6 hours.
Storage includes a main compartment, three front zip pockets, two side mesh pockets and an expandable bottom compartment.
Elastic cords and MOLLE webbing are described for securing outdoor gear such as trekking poles.
The feature description lists a breathable mesh back panel, adjustable shoulder, chest and waist straps, and reflective strips.
A detachable phone pouch and two patch panels are described in the feature copy.

Price

$39.16Save 30%

Reference price: ~~$55.99~~

Price checked: Nov 14, 2026

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Pros and cons

Pros

A 2-litre bladder is listed, with a wide opening, rotating bite valve and tube routing described for hands-free drinking.
The combination of several pockets and an expandable bottom section gives day-trip gear separate storage options.
The listing describes both a rain cover and a main fabric claimed to be waterproof, offering two stated weather-protection measures.

Technical specifications

8 specifications

Identity and capacity
Brand	RAINSMORE
Model	RM20101
Capacity	18 liters
Bladder volume	2 liters

Materials and fit
Material listed	Oxford
Colour	Black
Straps	adjustable

Dimensions
Dimensions	26W x 45H centimetres

What to know before buying

Listing details to confirm

Listing details conflict or remain unconfirmed: the 26W x 45H centimetres dimensions differ from another dimensions entry of 26.01 x 26.01 x 44.96 cm; 1.11 kg. A rain cover is claimed in the title and feature copy but is absent from the explicit contents list, which names only the 2L Hydration Bladder. Confirm the selected listing's contents and dimensions before purchase. The insulated compartment's 4–6 hour cooling duration and waterproofing language are manufacturer claims, not verified performance.

What’s in the box

2L Hydration BladderIncluded
Rain coverCheck selected pack

Check which accessories are included in your selected pack before buying.

Who is it for?

A good fit for

Day hikers, cyclists or runners who want a daypack with a listed 2-litre hydration bladder.
Buyers who value multiple compartments and attachment points for carrying small outdoor essentials.

Less suited to

Anyone needing a larger-capacity pack for extended trips, as the listed capacity is 18 litres.
Buyers who require confirmed rain-cover inclusion or a single settled set of dimensions without checking the listing.

RAINSMORE RM20101 18 L Hydration Backpack with 2 L Bladder · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.7 / 5 · 54 ratings

5 stars78%78%
4 stars18%18%
3 stars0%0%
2 stars4%4%
1 star0%0%

The supplied evidence contains aggregate ratings but no written customer feedback, so it does not establish what buyers liked or disliked. The rating distribution leans toward five-star ratings, with a smaller two-star share. Those ratings alone do not explain experiences with the bladder, fit, storage or weather protection.

Frequently asked questions

What is the listed pack and bladder capacity?

The backpack is listed at 18 litres, with a 2-litre bladder.

Does the listing say a rain cover is included?

The title and feature copy claim a rain cover, but the explicit contents list names only the 2L Hydration Bladder. Check the selected listing to confirm whether the cover is included.

What storage does the pack offer?

The feature description lists a main compartment, three front zip pockets, two side mesh pockets and an expandable bottom compartment, along with elastic cords and MOLLE webbing.