Columbia Casual Daypacks
Columbia Unisex Backpack
18L of carrying space.
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In stock
Checkout on Amazon. Check the seller, delivery and returns before ordering.
Offer checked 15 November 2026. Price and availability may change.
- Capacity
- 18L
A closer look
What matters before you buy
Packing the 18L bag
This bag has a listed 18L capacity. Think through the items you need to carry together, then check the compartment layout rather than choosing by the litre figure alone.
Side by side
Compare your options
Compare the details that matter to your choice. For more options, explore similar products below.
For a different size, compare G4Free Ultra Lightweight Small Rucksack Foldable Backpack Packable: 11L, alongside One Size for this option.
| Product | Capacity | Bag layout | Size | Shop the option |
|---|---|---|---|---|
 This optionColumbia Unisex Backpack | 18L | — | One Size | £20.25View on Amazon |
| 11L | Side pockets / Packable design | 11L | £19.99View on Amazon | |
| — | Side pockets | L | £29.99View on Amazon | |
| 30L | — | 30 Litre | £24.99View on Amazon |
- This option
Columbia Unisex Backpack
- Capacity
- 18L
- Bag layout
- Not supplied
- Size
- One Size
£20.25View on Amazon - Capacity
- 11L
- Bag layout
- Side pockets / Packable design
- Size
- 11L
£19.99View on Amazon- Capacity
- Not supplied
- Bag layout
- Side pockets
- Size
- L
£29.99View on Amazon- Capacity
- 30L
- Bag layout
- Not supplied
- Size
- 30 Litre
£24.99View on Amazon
The exact specification
Product details
- Size
- One Size
- Colour
- Black
- Capacity
- 18L
Full listing and model details
- Retailer listing
- Columbia Unisex Backpack, Trek 18L
- Brand
- Columbia
- Model
- 2094491
- Condition
- New
- ASIN
- B0CLWNH4Y3
Keep exploring
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G4Free Ultra Lightweight Small Rucksack Foldable Backpack Packable Rucksack 11L
- size
- 11L
- Model
- G4Free TN0243V
£19.99
View on AmazonSee details
Karrimor Metro Unisex Outdoor Hiking Backpack
- size
- 30 Litre
- Model
- KR15049P-DRF
£24.99
View on AmazonSee details
Wilson Unisex's Roland-Garros Super Tour Tennis Racket Bags Backpack
- size
- 19" x 6.5" x 49 cm
- Model
- WR8030901001
£79.99
View on AmazonSee details
Found the right option?
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Sources & our approach
Product details come from the retailer’s listing, checked 15 November 2026. Our buying notes explain the listed differences and questions to resolve before ordering. We have not handled or tested this product.
Our editorial approach