
















Men's Expandable Anti-Theft Backpack, 35 or 45 L
£134.90
10% off your first order
with the code BIENVENUE10
Offer valid until Sunday 25 October
- Free delivery
- Returns within 30 days
- Secure payment
Specifications
- Capacity: 35 L
- Laptop fit: up to 15.6 inches
- Material: nylon Oxford fabric, water-resistant
- External USB port with built-in cable (power bank not included)
- Expandable thickness: 16 to 23 cm
- Padded, breathable shoulder straps and back panel
- Hidden compartments and anti-theft pockets
- Fastenings: hidden zips
- Back strap to fix over a suitcase trolley
- Rain cover: no
- Measurement tolerance: ±1 to 3 cm
Description
The expandable anti-theft backpack for men that elevates your everyday: elegant, sturdy and ready for all your adventures
You dream of a discreet, stylish companion that goes with you from the office to the airport with no compromise on organisation or security. This expandable anti-theft backpack for men combines clean design and performance, ideal for city commutes, classes and weekend getaways. Its anti-theft pockets close with hidden zips, an external USB port with a built-in cable lets you charge on the move, and a strap slides it over the handle of your suitcase. Made of sturdy, water-repellent nylon Oxford, it protects your devices and documents from the rain and the knocks of daily life while staying light and comfortable. A true essential for keeping up the pace, stress-free.
Why choose this men’s backpack for your travels
Its dedicated pocket takes a laptop up to 15.6 inches, well padded to absorb knocks. The multiple compartments and anti-theft pockets with discreet fastenings keep your wallet, cables and passport close at hand and out of sight. The external USB port with built-in cable lets you charge your phone on the go, just connect your power bank, not included. As a result, you stay connected and organised everywhere. As an anti-theft laptop backpack for men, it keeps your computer and valuables protected on every journey.
Long-lasting comfort and adjustable capacity
The breathable back panel and ergonomic shoulder straps reduce fatigue on long days. With 35 L of volume and a zipped expansion that takes the thickness from about 16 to 23 cm, you gain room for clothes, files and accessories. The suitcase strap fits over the trolley handle, perfect for moving smoothly through stations and airports. A feature appreciated by many travellers and students. The grey anti-theft backpack and the black one both come in 35 L or 45 L.
Ready for work, university and city breaks
Versatile and unisex, this rucksack built for travel combines a business look with outdoor practicality. If you fly with cabin baggage, also take a look at our cabin backpack 40x20x25, to browse with our whole travel backpacks collection. You will find this style among our anti-theft backpacks too. Complete your set and travel light. Add this style to your cart now and make this men’s backpack your trusted ally for every departure.
Delivery & returns
Delivery
Free tracked delivery to the United Kingdom, in 7 to 12 working days.
As soon as your order is dispatched, you receive an email with a tracking link.
Returns
You have 30 days from delivery to request a return. The 14-day statutory right to cancel is included in this period.
See our returns policy for the conditions.
Why choose us?
At Galerie Sac à Dos, we believe a bag does more than carry your things.
It goes with you through your days, your plans and your getaways, and reflects the way you live.
That is why every style in our collection is carefully selected to combine style, comfort and durability, with no compromise.
Backpacks designed for real life
For work, lessons, travel, hiking or family days out, our bags adapt to every use.
Well-planned compartments, sturdy materials and careful comfort. Every detail counts to make your everyday life easier.
Style and function together
Every style combines careful design with modern practicality.
Classic, sporty or colourful, your bag stays practical, comfortable and true to your style.
Tested quality, lasting finishes
We favour hard-wearing materials (premium canvas, vegan leather, high-density polyester) and reinforced stitching, for a bag that keeps its shape and lasts.
A responsible and transparent selection
No overproduction and no empty promises, only pieces chosen for their reliability, their comfort and their timeless look.
Your satisfaction first
Free delivery, easy returns within 30 days and responsive customer service, because buying online should be as simple and enjoyable as planning your next adventure.
About Galerie Sac à Dos
At Galerie Sac à Dos, we believe a good bag can change the way you live, travel and express yourself.
We don’t make bags, we select them. Every style is carefully chosen from suppliers who share our values: quality, comfort and lasting style.
From the clean-lined city bag to the rugged hiking backpack, and the kids’ styles too, every piece reflects our standards: thoughtful design, reliable materials and a timeless look.
No passing trends, no compromise. Just bags made to stay with you for a long time, with confidence and personality.
Frequently Asked Questions
Are the materials durable and environmentally friendly?
We favour suppliers that use strong, quality materials, selected for their durability and their lower impact on the environment.
Does the product look exactly like the photos on the site?
Absolutely. All our photos are taken of the real products, with no misleading retouching. Colours may vary slightly depending on the lighting or the screen you use.
How do I track my order?
As soon as your order is dispatched, you receive an email with a tracking link to follow your parcel in real time.
Is payment on your site secure?
Yes, we use SSL security, which keeps your data private and protected. Your payment details are never stored.
What should I do if my parcel does not arrive or arrives damaged?
Contact our customer service straight away. We will open an investigation with the carrier and, if needed, arrange a replacement or a refund as quickly as possible.
How can I contact you with a question before or after my order?
You can contact us through the contact form on the site or by email at contact@galeriesacados.com. We reply within 24 working hours.





