

Product Details






A carry-on backpack designed for seamless travel. With expandable storage, smart organisation, AiroFoam® tech protection and durable materials, it’s built for every journey.
Backpack dimensions
Standard: H: 550mm x W: 350mm x D: 200mm
Expanded: H: 550mm x W: 350mm x D: 230mm
Weight
2.2kg
Capacity
40L standard, expands to 45L for extra packing space
Tech compartment
H: 540mm x W: 340mm x D: 20mm
Fits up to a 16” MacBook Pro, with or without a Mous sleeve
Suitable for all MacBook Air models
Laptop pocket (internal)
H: 350mm x W: 300mm
Fits all 14” and smaller MacBook Pro and MacBook Air models
Also compatible with iPad Pro 12.9” and all smaller iPad models
Tablet pocket (internal)
H: 290mm x W: 300mm
Airline fit
Compliant with most major airline cabin-baggage restrictions
Main materials
840D ballistic nylon: Highly durable and abrasion-resistant for long-term use.
Triple-layer PU and PC coating: Provides added strength and water resistance.
420D recycled nylon side panels: Lightweight and tough.
210D nylon lining: Smooth, protective interior.
AiroFoam® in tech compartment: A non-Newtonian, impact-absorbing technology designed to protect larger tech devices from drop damage. It’s made up of intelligent molecules that rush together upon impact, forming hydrogen bonds that temporarily break and consume significant amounts of energy that would otherwise impact your device.
PU-coated YKK zippers: Durable, smooth-gliding and water-repellent.
Certifications
RoHS and REACH compliant
25-year coverage under our Limited Lifetime Warranty
How protective is this backpack?
The Optimal Travel Backpack is built for serious protection. A separate tech compartment is equipped with AiroFoam® impact-absorbing technology, protecting laptops and tablets from drops and shocks. It's also highly water-resistant, keeping your gear safe from rain, spills and splashes – though we wouldn’t recommend submerging it in water. Whether you're caught in a storm or on the move, your tech stays protected.
Are the accessories included?
No, modular accessories like the Optimal Compression Wardrobe are sold separately. You can purchase them individually or as part of a bundle to customise your setup.
Can I use this backpack as a cabin bag?
Yes! At its standard 40-litre capacity, the Optimal Travel Backpack meets the cabin bag size requirements for most major airlines and fits in overhead bins. While we've thoroughly compared its dimensions with airline guidelines, we can’t guarantee compliance in every case due to airline-specific policies. It’s not designed to fit under the seat as a personal item.
“I'm a big fan of Mous, I have their backpack, cases and accessories and they are all just amazing. The attention to details, functionality and durability to me is what Mous stands for.”Reviews by Judge.Me
I already own a Mous Protective Lid backpack with 23 litres capacity which I use every day. Having just retired I wanted the same quality and design characteristics but with more volume that works better for me for short trips away. The Mous Travel backpack at up to 45 litres capacity satisfies my requirements. I love the design features and have added the accessories - compression wardrobe, toiletry, tech and document pouches to maximise the benefit in use. I’m super happy with the purchases that provide a premium quality product that hits the mark in both form and function.
Another excellent product from Mous
This is the best travel backpack I’ve ever owned.
I already have three other Mous bags, plus the travel pouches, phone cases, and a few other bits. Every single item has held up brilliantly.
This one tops them all.
Perfect design. Comfortable to carry. Smart compartments. Build quality that makes other brands feel like knock-offs.
I wouldn’t travel with anything else now.
Mous continues to smash it. Nothing I’ve bought from you has ever disappointed.
You’ve nailed it. Again.
Padding should be a softer as it hurts my back after wearing in for a long time on my motorcycle. It should be more flexible.