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The Underseater Duffel Bag

EVERYDAY COLLECTION - 28L

Sale price€169

✔︎ Compact underseater with the functionality of a suitcase.

✔︎ Perfect for work, sports and travel. Smart organization with a padded 16” laptop compartment and removable tech pouch.

✔︎ Made from 100% recycled materials with a water- and scratch-resistant finish.


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In stock in our warehouse - Yet pieces available
This product is sold out
Ordered before 22:00, delivered on 3 March
Free shipping on orders over €50

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PU-vegan leather
Unique anti-stuck zippers
Made from 100% recycled materials
Water-repellent material/coating

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€338,30 €398
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15% discount on a suitcase – automatically applied at checkout.

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Description
Properties
Lifetime warranty
About ONYX

The Underseater Duffel is designed as the perfect bag for your daily routine and your travels.

The spacious main compartment opens fully like a suitcase, making packing clear and fast. Inside, you’ll find smart organizers, a padded 16-inch laptop sleeve, and a removable tech pouch with a magnetic closure — ideal for your cables, chargers, and other gadgets.

Made from recycled polyester with PU vegan leather and finished with a water-repellent, scratch-resistant coating, this duffel is built to handle your busy routine as well as any trip.

Thanks to its compact size, this duffel works perfectly as an underseater — ideal when you want to fly without a suitcase.

• Volume: 28 liters
• Dimensions: 42 × 18 × 30 cm (W×D×H)
• Material: Recycled polyester combined with PU vegan leather
• Finish: Water-repellent and scratch-resistant
• Layout: Large suitcase-style compartment with multiple organizers
• Laptop compartment: Padded 16-inch sleeve
• Other: Removable tech pouch with magnetic closure, trolley sleeve, internal organizers
• Carry options: Adjustable and removable shoulder strap + reinforced handles

We offer a lifetime product warranty on all our products.

At ONYX® we create high-quality, sustainable travel products that will take you miles without compromising on look & comfortable feel.

Join 100,000+ happy customers
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Why 100,000 others are fans

EVERYDAY COLLECTION

Designed for everyday use, built for every trip

We created this bag because you need one that can handle everything: work, school, sports, and spontaneous trips. A bag compact enough to qualify as an underseater, yet spacious enough to pack in an organized way—just like opening a suitcase. With thoughtful pockets, a 16-inch laptop compartment, and a detachable tech pouch, it offers exactly the functionality you miss in regular bags. In short: one bag for every occasion.

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Save on hand luggage costs without compromise
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Designed like a suitcase, but more compact
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Detachable Tech Organizer for maximum flexibility

Built to go further.

Save on hand luggage costs without compromise

Specially designed to fit perfectly under your airplane seat, eliminating the need to book additional carry-on luggage. Ideal for short trips, city breaks, and business trips, you'll travel lighter, smarter, and more affordably without sacrificing space or organization.

Designed like a suitcase, but more compact

The main compartment opens fully like a suitcase, allowing you to pack neatly and clearly separate your items. No cramming into a traditional duffel bag, but structured organization and quick access to everything you need.

Detachable Tech Organizer for maximum flexibility


The integrated tech organizer is fully removable and designed for cables, chargers, AirPods, power banks, and other essentials. Use it separately during your flight or easily transfer it to another bag. Smart, modular, and perfectly suited to the modern traveler.

Lifetime warranty

Our Hybrid Pro collection is covered by a lifetime warranty.

Free Shipping

Free shipping on all our suitcases and backpacks.

Dutch design

High quality. Designed in the Netherlands, made for the world.

Uniek en doordacht design

Engineering Excellence

Thoughtful down to the last detail
Made from high quality materials
Tested under the toughest conditions

Frequently Asked Questions

Do you have another question about one of our products? Please contact us using the contact form below
Contact Support

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