Mous Day backpack: a lightweight but still impressively protective tech-friendly backpack

Mous Day backpack one-minute review

The Mous Day Backpack is the brand’s latest addition to its newest line of products – tech-first backpacks – and it’s a fantastic option for commuters who also want a bag that’s both relatively rugged and stylish. 

Whether you’re a tech fanatic or simply in need of a solid backpack to get you to and from work with your laptop, the best backpack should be lightweight while still offering solid protection, keeping your back cool on busy public transport, but also displaying some stylish flair. I’ve been using the Mous 25L backpack for about a year now, and it’s been a real boon for traveling. Unfortunately, though, it’s just a bit too bulky and heavy for day-to-day use – so I was thrilled to learn the brand was introducing the slightly smaller 20L Day Backpack that’s a bit lighter at just 1kg. 

Priced at $149.99 / £149.99 / roughly AU$240, the Mous Day Backpack arrives in four color options: Sage (green), Marine (blue), Stone (gray) and Midnight (black). I opted for the Sage colorway, which with its contrasting gray accents, offers a stylish yet understated finish. 

The materials are all water-resistant (420D recycled nylon and coated 600D polyester), meaning any contents will be protected from light rain and showers. The bag has an adjustable, sewn-in strap with a minimum strap length of 22 inches / 56cm and a max of 32.67 inches / 83cm, plus the back panel is padded to offer a comfortable experience all day long; however, this does mean it can get a little hot.

The Day Backpack’s greatest asset is its inclusion of nine compartments – although, of course, this doesn’t compare to its older sibling’s seventeen. You’ll find three on the outside, two zipped compartments on the outside of the case (one on its right-hand side at the front, and the other at the back), plus a water bottle pouch.

Open up the G-hook lid fastening and unzip its central base-to-lid YKK zip to reveal the main bag and the remaining compartments; two sleeves and a zipped pocket with two slip pockets sewn in. According to Mous, the laptop sleeve, which is the back-most pocket, is 14.9 x 11.6in / 380mm x 295mm (H x W), while the tablet pocket is 13.38 x 10.4in / 340mm x 265mm.

To protect your kit further, the bag has an elevated base, meaning that the edge of your device remains 1.18in / 30mm above ground, offering some drop and impact protection. However, unlike the Mous 25L backpack, there’s no AiroFoam, meaning extreme drops could still pose a risk of damage to any tech within – so no launching this bag down any stairwells.

The zip, it appears, isn’t for everyone. Personally, I love it – not having to rummage around from the neck of my backpack to the bottom every time I need to find my charger or whatever other odds and ends I’ve haphazardly launched into my bag is a huge boon.

However, whenever I opened my backpack on public transport, people looked on with a mix of horror and amazement as I practically gutted my bag. Among my friends and colleagues, there was a similar mix of intrigue, enthusiasm and disturbance – but most agreed that, at the very least, it’s a useful mechanism and that the discrete lining concealing it also retains the backpack’s overall stylish appearance. It will come down to personal taste, but I love it.

In my experience, the only slight design flaw is that, when more full, the Day Backpack’s embedded side panel magnets aren’t strong enough to snap the lip of the lid closed tightly, meaning that if the bag tips over, it’s possible smaller or loose contents may spill out. That’s only happened to me once, and in fairness, I was really pushing that 20L capacity to its limits – but it’s worth highlighting.

Mous 25L backpack: Specs

Should you buy the Mous Day backpack?

Buy it if…

Don’t buy it if…

Mous Day backpack: Also consider

How I tested the Mous Day backpack

• I used the Mous Day backpack for a month
• I made several long-haul journeys, as well as everyday trips, with it
• I dropped it with my laptop inside… more times than I’d like to admit

I used the Mous Day 20L backpack for a month as my main commuting backpack, as well as my main travel bag for conferences and creative getaways. Inside, I stashed my laptop, iPad, various cables, headphones – name a gadget, it was in there – and I found its protections and compartments to be robust and useful.

During testing, I encountered various weather conditions from heatwaves to torrential rain, meaning I was able to test the bag’s environmental protections, too. To test its capacity and utility, I filled it with 2-3 days’ worth of clothes while travelling, which is roughly the amount I’d expect a 20L backpack to be able to hold.

First reviewed October 2024