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 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 Danviken collection shopper for women - the bag that does it all!
A high-grade handbag and shoulder bag with a beautiful design, a full 5 compartments and a smart layout. The bag has a large main compartment that closes with a zipper. Made from high-quality materials with a luxe finish. A bag your collection should not be without. A real eye-catcher!

Layout
The bag has two main compartments that close with zippers. Everything you carry day to day fits in easily – a water bottle, your wallet, a bag-in-bag, a tablet and more. On the outside the Danviken handbag has 1 zip pocket. The main compartment inside also has two slip pockets and a zip pocket, so the whole thing stays easy to keep in order. Roomy enough for your everyday things, and a beautiful design at the same time. Thanks to the detachable, adjustable shoulder strap you can carry the bag in several ways: as a handbag and as a shoulder bag. Zippers that run smoothly, and comfortable carrying thanks to the adjustable shoulder strap.

Features

• Top-quality handbag and shoulder bag from the Danviken series
• Roomy main compartment with slip pockets and a zip pocket
• Zip pocket on the outside
• Comfortable, adjustable shoulder strap
• The wide strap makes the bag comfortable to carry
• Scandinavian design
• Dimensions: 42 cm wide x 25 cm high x 15 cm deep

Lundholm
Lundholm is known as a brand for high-quality leather goods. Built on a Scandinavian grounding in quality, durability and simplicity, Lundholm products are made to last and to be a pleasure to use for years.

Lundholm Danviken collection shopper for women - the bag that does it all!
A high-grade handbag and shoulder bag with a beautiful design, a full 5 compartments and a smart layout. The bag has a large main compartment that closes with a zipper. Made from high-quality materials with a luxe finish. A bag your collection should not be without. A real eye-catcher!

Layout
The bag has two main compartments that close with zippers. Everything you carry day to day fits in easily – a water bottle, your wallet, a bag-in-bag, a tablet and more. On the outside the Danviken handbag has 1 zip pocket. The main compartment inside also has two slip pockets and a zip pocket, so the whole thing stays easy to keep in order. Roomy enough for your everyday things, and a beautiful design at the same time. Thanks to the detachable, adjustable shoulder strap you can carry the bag in several ways: as a handbag and as a shoulder bag. Zippers that run smoothly, and comfortable carrying thanks to the adjustable shoulder strap.

Features

• Top-quality handbag and shoulder bag from the Danviken series
• Roomy main compartment with slip pockets and a zip pocket
• Zip pocket on the outside
• Comfortable, adjustable shoulder strap
• The wide strap makes the bag comfortable to carry
• Scandinavian design
• Dimensions: 42 cm wide x 25 cm high x 15 cm deep

Lundholm
Lundholm is known as a brand for high-quality leather goods. Built on a Scandinavian grounding in quality, durability and simplicity, Lundholm products are made to last and to be a pleasure to use for years.

Lundholm Danviken collection shopper for women - the bag that does it all!
A high-grade handbag and shoulder bag with a beautiful design, a full 5 compartments and a smart layout. The bag has a large main compartment that closes with a zipper. Made from high-quality materials with a luxe finish. A bag your collection should not be without. A real eye-catcher!

Layout
The bag has two main compartments that close with zippers. Everything you carry day to day fits in easily – a water bottle, your wallet, a bag-in-bag, a tablet and more. On the outside the Danviken handbag has 1 zip pocket. The main compartment inside also has two slip pockets and a zip pocket, so the whole thing stays easy to keep in order. Roomy enough for your everyday things, and a beautiful design at the same time. Thanks to the detachable, adjustable shoulder strap you can carry the bag in several ways: as a handbag and as a shoulder bag. Zippers that run smoothly, and comfortable carrying thanks to the adjustable shoulder strap.

Features

• Top-quality handbag and shoulder bag from the Danviken series
• Roomy main compartment with slip pockets and a zip pocket
• Zip pocket on the outside
• Comfortable, adjustable shoulder strap
• The wide strap makes the bag comfortable to carry
• Scandinavian design
• Dimensions: 42 cm wide x 25 cm high x 15 cm deep

Lundholm
Lundholm is known as a brand for high-quality leather goods. Built on a Scandinavian grounding in quality, durability and simplicity, Lundholm products are made to last and to be a pleasure to use for years.

Lundholm Women's Large Nylon Shopper with Zip - Lightweight and Stylish | Nykroppa Series

A beautiful large shopper from Lundholm. Made from high-quality nylon, which makes it very light to carry. The shopper has a large main compartment that closes with a zip, plus an inner zip pocket and slip pockets.

The shopper is ideal because it is light to carry, roomy and easy to use for all kinds of purposes. From grocery bag to work bag and gym bag, this shopper has the right size and ease of use to become your favorite bag!

Dimensions: 55 (l) x 40 (w) x 7 (d) cm

Shopper, gym bag and travel bag in one

The quilted puffer fabric makes this bag not only good-looking, but also ultra-light and supple. That makes it surprisingly versatile:

• Gym bag – the large zipped main compartment takes sportswear, shoes and a towel with room to spare. A favorite as a gym bag in our own team.
• Travel bag / cabin baggage – at 55 x 40 x 7 cm it fits within the cabin-baggage footprint (55 x 40 cm) of airlines including Ryanair (Priority), Transavia, Wizz Air (Priority), Lufthansa, Eurowings, TUI fly and Vueling. And because it folds flat, you can also pack it inside your suitcase as an extra bag for the trip home.
• Weekend bag or shopper – light enough to carry all day, roomy enough for everything that has to come along.

Check the current sizes per airline in our cabin baggage comparison table 2026, or browse all travel bags & cabin baggage.

Frequently asked questions

Is this bag suitable as a gym bag?
Yes — the roomy zipped main compartment takes sportswear, shoes and a towel, and the light nylon means you barely feel the bag itself.

Can I take it on the plane as cabin baggage?
As cabin baggage in the overhead locker: at 55 x 40 x 7 cm it fits within the usual cabin sizes (55 x 40 x 20 cm and larger). For the free under-the-seat size (40 x 30 x 20 cm) it is too long — fold it flat into your suitcase as an extra bag instead, or go for our Underseater backpack.

Is the bag heavy?
No, the high-grade nylon weighs almost nothing — welcome when every kilo counts for cabin baggage.

How does the bag close?
With a zip across the whole main compartment; inside there is an extra zip pocket and slip pockets.

Lundholm
Lundholm is known as a brand for high-quality bags and fashion accessories. With the Scandinavian focus on quality, durability and simplicity, Lundholm products are made to be enjoyed for a long time.

Lundholm Women's Large Nylon Shopper with Zip - Lightweight and Stylish | Nykroppa Series

A beautiful large shopper from Lundholm. Made from high-quality nylon, which makes it very light to carry. The shopper has a large main compartment that closes with a zip, plus an inner zip pocket and slip pockets.

The shopper is ideal because it is light to carry, roomy and easy to use for all kinds of purposes. From grocery bag to work bag and gym bag, this shopper has the right size and ease of use to become your favorite bag!

Dimensions: 55 (l) x 40 (w) x 7 (d) cm

Shopper, gym bag and travel bag in one

The quilted puffer fabric makes this bag not only good-looking, but also ultra-light and supple. That makes it surprisingly versatile:

• Gym bag – the large zipped main compartment takes sportswear, shoes and a towel with room to spare. A favorite as a gym bag in our own team.
• Travel bag / cabin baggage – at 55 x 40 x 7 cm it fits within the cabin-baggage footprint (55 x 40 cm) of airlines including Ryanair (Priority), Transavia, Wizz Air (Priority), Lufthansa, Eurowings, TUI fly and Vueling. And because it folds flat, you can also pack it inside your suitcase as an extra bag for the trip home.
• Weekend bag or shopper – light enough to carry all day, roomy enough for everything that has to come along.

Check the current sizes per airline in our cabin baggage comparison table 2026, or browse all travel bags & cabin baggage.

Frequently asked questions

Is this bag suitable as a gym bag?
Yes — the roomy zipped main compartment takes sportswear, shoes and a towel, and the light nylon means you barely feel the bag itself.

Can I take it on the plane as cabin baggage?
As cabin baggage in the overhead locker: at 55 x 40 x 7 cm it fits within the usual cabin sizes (55 x 40 x 20 cm and larger). For the free under-the-seat size (40 x 30 x 20 cm) it is too long — fold it flat into your suitcase as an extra bag instead, or go for our Underseater backpack.

Is the bag heavy?
No, the high-grade nylon weighs almost nothing — welcome when every kilo counts for cabin baggage.

How does the bag close?
With a zip across the whole main compartment; inside there is an extra zip pocket and slip pockets.

Lundholm
Lundholm is known as a brand for high-quality bags and fashion accessories. With the Scandinavian focus on quality, durability and simplicity, Lundholm products are made to be enjoyed for a long time.