Lundholm Underseater Waterproof Backpack - 15.6 inch Laptop Bag with TSA Lock

Meet the Underseater waterproof backpack from the exclusive collection by the Scandinavian brand Lundholm. This stylish, versatile backpack in elegant beige or black brings together Scandinavian design and hard-working functionality. Perfect for the modern traveler or professional on the move – for work, study or a flight. Thanks to the waterproof zippers and high-quality materials, your things stay dry and safe, even in an unexpected downpour. With its built-in TSA lock and smart suitcase-style layout inside, this is the ideal underseater for cabin baggage.

Benefits

This luxury backpack is designed with an eye for detail and everyday ease. Made from durable, fully waterproof material, it offers solid protection against moisture. The clever layout, inspired by a suitcase, with a padded 15.6 inch laptop compartment at the back, roomy sections and handy slip pockets, keeps everything organized. The compression straps on the sides let you cinch the bag down for a compact fit. With a security zipper for extra protection, a dedicated pocket for your water bottle and several zip pockets, this backpack is extra practical for daily use or travel. Thanks to its cabin-friendly dimensions, you take it on board without a second thought.

Specifications

• Made from high-quality, fully waterproof material
• Waterproof zippers for solid protection
• Padded laptop compartment for 15.6 inch laptops (positioned at the back)
• Smart suitcase-style layout with roomy sections and slip pockets
• Back pocket with zip closure and TSA lock for safe storage
• Compression straps on the sides to adjust the size
• Dedicated pocket for a water bottle
• Several zip pockets for organized storage
• Cabin bag approved (fits under the seat) Dimensions: 40 cm x 30 cm x 16 cm
• 22L - maximum use of space
• Color: Black and Beige
• Scandinavian Design

Which airlines let the Underseater fly free?

At 40 x 30 x 16 cm, the Underseater fits inside the free under-the-seat allowance (40 x 30 x 20 cm) of virtually every airline — so you pay nothing extra for cabin baggage:

• Ryanair – free 40 x 30 x 20 cm (increased since 2026): fits
• Transavia – free 40 x 30 x 20 cm, max 10 kg: fits
• Wizz Air – free 40 x 30 x 20 cm: fits
• easyJet – free 45 x 36 x 20 cm: fits easily
• Eurowings – free 40 x 30 x 25 cm: fits
• TUI fly, Corendon and Vueling – free 40 x 30 x 20 cm: fits
• KLM and Lufthansa – fits as included cabin baggage or carry-on

Check the current rules per airline in our cabin baggage guide and the 2026 comparison table. Airlines can change their rules — always check your own booking.

Frequently asked questions

Does the Underseater fly as free cabin baggage?
Yes. At 40 x 30 x 16 cm it fits inside the common free under-the-seat allowance of 40 x 30 x 20 cm at Ryanair, Wizz Air, Transavia, easyJet, Eurowings, TUI fly, Corendon and Vueling, among others.

Which laptop fits inside?
At the back there is a padded compartment for a laptop up to 15.6 inch, easy to take out separately at security.

Is the backpack waterproof?
Yes, it is made from fully waterproof material with waterproof zippers, so your laptop and clothes stay dry.

What is a TSA lock?
A lock that customs can open with a universal key without forcing it — your things stay safe, even if the bag has to go in the hold for once.

How much fits inside?
22 liters, with a suitcase-style layout, laptop compartment, bottle pocket, several zip pockets and compression straps to pull the bag compact.

Lundholm - Quality Design | Scandinavian Elegance

Lundholm is a byword for high quality and timeless design. Guided by the Scandinavian values of durability, simplicity and function, Lundholm creates products that are beautiful and made to last. The Underseater collection embodies that vision with a modern, practical touch – perfect for anyone who wants style, security and easy travel in one bag.

Lundholm Luxury Backpack Laptop Bag 15.6 inch with USB Port - Scandinavian Design - Deep Black

Meet the luxury backpack from the exclusive Lundholm collection. Sleek and versatile in deep black, it pairs Scandinavian design with serious functionality and a luxurious finish. Perfect for the modern man or woman on the move – for work, school, study or the daily commute. Thanks to its water-resistant materials and water-repellent zippers, your things stay dry and protected, even in light rain. With ergonomic straps for all-day comfort, a built-in USB port for charging on the go and a smart layout inside, this is the bag for an active life.

Benefits

This luxury backpack was designed with an eye for detail, durability and everyday ease. Made from high-quality nylon/polyester, it protects your gear from splashes and bad weather. The smart layout, with a padded 15.6 inch laptop compartment, several zip pockets and handy sections, keeps everything organized. The ergonomic, adjustable shoulder straps and the top handle make it comfortable to carry, while the trolley strap is perfect for travel. With a safety zipper for extra security, a USB station for charging your devices and a small zip pocket on the shoulder strap, this backpack earns its place in daily use, at work and at school.

Specifications

• Made from high-quality, water-resistant nylon/polyester (outer shell)
• Water-repellent zippers for the best protection
• Padded laptop compartment that fits 15.6 inch laptops (34.5 x 19.4 cm)
• Roomy main compartment with zipper and several sections
• Several zip pockets, including a safety zipper and a small zip pocket on the shoulder strap
• Ergonomic, adjustable shoulder straps for comfortable carrying - built for long days
• Built-in USB port for charging on the go
• Strap to attach the bag to a suitcase or trolley
• Top handle for carrying by hand
• Dimensions: 43 cm x 30 cm x 12 cm Capacity: 22 liters
• Color: Deep Black

Does this backpack work as hand luggage?

At 43 x 30 x 12 cm and with its handy trolley strap, this backpack is ideal as hand luggage in the overhead bin: it fits comfortably within the cabin sizes of KLM (55 x 35 x 25 cm), Lufthansa and Eurowings (55 x 40 x 23 cm) and Ryanair and Transavia (55 x 40 x 20 cm). For the tighter free under-seat spot (40 x 30 x 20 cm) it is just too tall at 43 cm — pick our Lundholm Underseater (40 x 30 x 16 cm) for that.

Not sure about the sizes on your flight? Have a look at the hand luggage comparison table per airline.

Frequently asked questions

Does this backpack fit as hand luggage on the plane?
Yes, as cabin luggage in the overhead bin: at 43 x 30 x 12 cm it stays within the common cabin sizes (55 x 40 x 23 cm and 55 x 35 x 25 cm). For the free under-seat spot (40 x 30 x 20 cm), the Lundholm Underseater is the better fit.

Which laptop fits inside?
A padded compartment that fits a 15.6 inch laptop (34.5 x 19.4 cm).

Does the bag have a USB port?
Yes, a built-in USB port to charge your phone on the go (power bank not included).

Can I attach it to my suitcase?
Yes, the trolley strap slides straight over the handle of your suitcase.

Lundholm - Quality Design | Scandinavian Elegance

Lundholm stands for high quality and timeless design. Built on our Scandinavian values of durability, simplicity and function, Lundholm creates products that are beautiful to look at and made to last. This Luxury collection carries that vision with a modern touch — perfect for anyone who wants style, comfort and everyday practicality in one bag.

Lundholm Underseater Waterproof Backpack - 15.6 inch Laptop Bag with TSA Lock

Meet the Underseater waterproof backpack from the exclusive collection by Scandinavian brand Lundholm. This sleek, versatile backpack in elegant beige or black pairs Scandinavian design with unmatched functionality. Perfect for the modern traveler or professional on the move – whether for work, study or a flight. Thanks to the waterproof zippers and high-quality materials, your things stay dry and safe, even in an unexpected downpour. With the built-in TSA lock and the smart suitcase-style layout inside, this is the ideal underseater for carry-on travel.

Benefits

This premium backpack was designed with an eye for detail and everyday ease. Made from durable, fully waterproof material, it gives your gear the best possible protection against moisture. The clever suitcase-inspired layout, with a padded 15.6 inch laptop compartment at the back, roomy sections and handy slip pockets, keeps everything organized and easy to find. The compression straps on both sides let you cinch the bag down for a compact fit. With a safety zipper for extra security, a dedicated pocket for your water bottle and several zip pockets, this backpack earns its place in daily use and on the road. And thanks to its carry-on friendly dimensions, it comes along on the plane without a fuss.

Specifications

• Made from high-quality, fully waterproof material
• Waterproof zippers for the best protection
• Padded laptop compartment that fits 15.6 inch laptops (positioned at the back)
• Smart suitcase-style layout with roomy sections and slip pockets
• Back pocket with zipper and TSA lock for secure storage
• Compression straps on both sides to adjust the size
• Dedicated pocket for a water bottle
• Several zip pockets for organized storage
• Carry-on friendly (fits under the seat) Dimensions: 40 cm x 30 cm x 16 cm
• 22L - Maximum use of space
• Color: Black and Beige
• Scandinavian Design

Which airlines let the Underseater fly free?

At 40 x 30 x 16 cm, the Underseater stays within the free under-seat size (40 x 30 x 20 cm) of almost every airline — so you pay nothing extra for hand luggage:

• Ryanair – free 40 x 30 x 20 cm (increased in 2026): fits
• Transavia – free 40 x 30 x 20 cm, max 10 kg: fits
• Wizz Air – free 40 x 30 x 20 cm: fits
• easyJet – free 45 x 36 x 20 cm: fits with room to spare
• Eurowings – free 40 x 30 x 25 cm: fits
• TUI fly, Corendon and Vueling – free 40 x 30 x 20 cm: fits
• KLM and Lufthansa – fits as included hand luggage or carry-on

Check the current rules per airline in our hand luggage guide and the 2026 comparison table. Airlines can change their rules — always check your own booking.

Frequently asked questions

Does the Underseater fit as free hand luggage on the plane?
Yes. At 40 x 30 x 16 cm it stays within the common free under-seat size of 40 x 30 x 20 cm at Ryanair, Wizz Air, Transavia, easyJet, Eurowings, TUI fly, Corendon and Vueling, among others.

Which laptop fits inside?
There is a padded compartment at the back for a laptop up to 15.6 inch, easy to take out separately at security.

Is the backpack waterproof?
Yes, it is made from fully waterproof material with waterproof zippers, so your laptop and clothes stay dry.

What is a TSA lock?
A lock that customs can open with a universal key without forcing it — your things stay safe, even if the bag has to travel as checked luggage for once.

How much fits inside?
22 liters, with a suitcase-style layout, laptop compartment, bottle pocket, several zip pockets and compression straps to pull the bag compact.

Lundholm - Quality Design | Scandinavian Elegance

Lundholm stands for high quality and timeless design. Built on the Scandinavian values of durability, simplicity and function, Lundholm creates products that are beautiful to look at and made to last. The Underseater collection carries that vision with a modern, practical touch — perfect for anyone who wants style, security and easy travel in one bag.

Lundholm Abisko Luxury Backpack - Laptop Bag Women 15.6 inch - Scandinavian Design

Meet the Lundholm Abisko luxury laptop backpack. This stylish, seriously roomy backpack in elegant cream brings together Scandinavian design, hard-working functionality and a beautiful finish. Perfect for the modern woman on the move – for work, study, travel or as cabin baggage. Thanks to the splash-proof materials and sturdy zippers, your things stay dry and protected. With wide, ergonomic straps for comfort (even on long days, without back strain) and a ventilated back panel for airflow, this is the ideal bag for an active lifestyle.

Benefits

This luxury backpack is designed with an eye for detail, durability and everyday ease. Made from high-quality nylon/polyester, it offers solid protection against splashes and daily wear. The smart layout – a padded 15.6 inch laptop compartment, several zip pockets and handy sections – keeps everything organized, including two bottle pockets, a phone pocket, two pen loops inside and a security zip pocket at the back for valuables. The anti-theft pocket on the back and the trolley strap make it perfect for travel, while the wide straps and airy back panel keep it comfortable without back strain. Two zip pockets on the front and a zip pocket inside add extra storage – ideal for work, school or as compact cabin baggage.

Specifications

• Made from high-quality, splash-proof nylon/polyester
• Sturdy zippers for solid protection
• Padded laptop compartment for 15.6 inch laptops (34.5 x 19.4 cm)
• Roomy main compartment with zip closure, an inside zip pocket and several sections
• Two zip pockets on the front for quick access
• Security zip pocket (anti-theft) on the back
• Phone pocket and two pen loops inside
• Two bottle pockets
• Wide, ergonomic and adjustable shoulder straps for comfortable carrying
• Ventilated back panel for airflow and comfort
• Trolley strap to attach it to a suitcase or trolley
• Dimensions: 46 cm x 28 cm x 15 cm (fully expanded for extra capacity) Capacity: 25 liters
• Color: Cream
• Weight: lightweight design for easy carrying
• Scandinavian Design

Lundholm - Quality Design | Scandinavian Elegance

Lundholm is a byword for high quality and timeless design. Guided by Scandinavian values of durability, simplicity and function, Lundholm creates products that are beautiful and made to last. The Abisko collection embodies that vision with a modern, unisex touch – perfect for anyone who wants style, comfort and practical ease in one bag.