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HK Expandable Waterproof Laptop Backpack: the smart backpack for those always on the move: waterproof protection, ergonomic comfort, and expandable space — all with a design that respects your style.

You don’t live by a fixed routine anymore. You move — from work to college, from home office to coworking space, from the city to the open road.
The problem? Your old backpacks couldn’t keep up with this new pace. They get soaked, feel heavy, strain your back, and ruin your look.

The HK Expandable Waterproof Laptop Backpack is different — it was created for urban professionals and students who need structure, not just space.

Comfort you can feel: S-shaped straps that relieve pressure from your shoulders and lower back.
Full waterproofing with 900D Oxford fabric: keeps your laptop, tablet, and documents protected in any weather.
Expandable up to 25L without losing shape: carry a jacket, notebooks, lunch box, or camera gear without it looking like a suitcase.
Minimalist urban design: pairs with a blazer, t-shirt, or jacket — a professional look without overdoing it.
Hidden anti-theft compartments: keep your phone and documents safe from wandering hands.

This backpack was designed for what others overlooked: your real routine.
It doesn’t matter if you ride a bike or take a cab, if you study or close deals — your gear stays secure, dry, charged, and organized.

Specifications:

Material: Oxford
Dimensions: 42cm x 28cm x 15cm
Capacity: 25l
Weight: 1060g
Color: Black, Grey

Waterproof
Adjustable size
Anti theft
Lightweight
Internal padding

Polyester

Laptop compartment
Hidden pockets
External pockets
Water bottle holder
Single compartment
Built in compartments

Shoulder strap
Backpack strap
Handle

Shipping Details

We process all orders quickly and ship within 3–7 business days. Delivery times may vary depending on your location. Once your order has been shipped, you will receive a tracking number so you can follow your package every step of the way.

Why buy from Bolsnik

Honest materials, function-first design and bags built to outlast the trends. Fast, fully tracked delivery, easy 30-day returns and real human support — every order, every time.

Your details are encrypted and never sold. We only use your information to process your order and support you — nothing more. Read our full privacy policy anytime.

Have a question about sizing, materials, shipping, or your order? Reach our customer team any time — we usually reply within a few hours. Email us at support@bolsnik.com.

Product DescriptionWhat you're carrying, in a nutshell

HK Expandable Waterproof Laptop Backpack: the smart backpack for those always on the move: waterproof protection, ergonomic comfort, and expandable space — all with a design that respects your style.

You don’t live by a fixed routine anymore. You move — from work to college, from home office to coworking space, from the city to the open road.
The problem? Your old backpacks couldn’t keep up with this new pace. They get soaked, feel heavy, strain your back, and ruin your look.

The HK Expandable Waterproof Laptop Backpack is different — it was created for urban professionals and students who need structure, not just space.

Comfort you can feel: S-shaped straps that relieve pressure from your shoulders and lower back.
Full waterproofing with 900D Oxford fabric: keeps your laptop, tablet, and documents protected in any weather.
Expandable up to 25L without losing shape: carry a jacket, notebooks, lunch box, or camera gear without it looking like a suitcase.
Minimalist urban design: pairs with a blazer, t-shirt, or jacket — a professional look without overdoing it.
Hidden anti-theft compartments: keep your phone and documents safe from wandering hands.

This backpack was designed for what others overlooked: your real routine.
It doesn’t matter if you ride a bike or take a cab, if you study or close deals — your gear stays secure, dry, charged, and organized.

Specifications:

Material: Oxford
Dimensions: 42cm x 28cm x 15cm
Capacity: 25l
Weight: 1060g
Color: Black, Grey

Details About The ProductDesigned to protect and organise

Waterproof
Adjustable size
Anti theft
Lightweight
Internal padding

Polyester

Laptop compartment
Hidden pockets
External pockets
Water bottle holder
Single compartment
Built in compartments

Shoulder strap
Backpack strap
Handle

Shipping & DeliveryFast, tracked dispatch

Shipping Details

We process all orders quickly and ship within 3–7 business days. Delivery times may vary depending on your location. Once your order has been shipped, you will receive a tracking number so you can follow your package every step of the way.

Why Purchase From UsShop with confidence

Why buy from Bolsnik

Honest materials, function-first design and bags built to outlast the trends. Fast, fully tracked delivery, easy 30-day returns and real human support — every order, every time.

Your PrivacyYour data stays yours

Your details are encrypted and never sold. We only use your information to process your order and support you — nothing more. Read our full privacy policy anytime.

Customer SupportWe are here to help you

Have a question about sizing, materials, shipping, or your order? Reach our customer team any time — we usually reply within a few hours. Email us at support@bolsnik.com.

HK Expandable Waterproof Laptop Backpack

€69,99 €89,99 Save 22%

Taxes included. Shipping calculated at checkout.

Michelle and 758 people purchased

HK Expandable Waterproof Laptop Backpack: the smart backpack for those always on the move: waterproof protection, ergonomic comfort, and expandable space — all with a design that respects your style.

You don’t live by a fixed routine anymore. You move — from work to college, from home office to coworking space, from the city to the open road.
The problem? Your old backpacks couldn’t keep up with this new pace. They get soaked, feel heavy, strain your back, and ruin your look.

The HK Expandable Waterproof Laptop Backpack is different — it was created for urban professionals and students who need structure, not just space.

Comfort you can feel: S-shaped straps that relieve pressure from your shoulders and lower back.
Full waterproofing with 900D Oxford fabric: keeps your laptop, tablet, and documents protected in any weather.
Expandable up to 25L without losing shape: carry a jacket, notebooks, lunch box, or camera gear without it looking like a suitcase.
Minimalist urban design: pairs with a blazer, t-shirt, or jacket — a professional look without overdoing it.
Hidden anti-theft compartments: keep your phone and documents safe from wandering hands.

This backpack was designed for what others overlooked: your real routine.
It doesn’t matter if you ride a bike or take a cab, if you study or close deals — your gear stays secure, dry, charged, and organized.

Specifications:

Material: Oxford
Dimensions: 42cm x 28cm x 15cm
Capacity: 25l
Weight: 1060g
Color: Black, Grey

Buy More, Save More

We want you to love your Bolsnik. If something isn't right, tell us within 30 days and we'll make it right — repair, replace or refund.

Orders are dispatched within 3–7 business days with fully tracked delivery. Times vary by destination, and you'll get a tracking link as soon as it ships.

Our bags are made with carefully selected materials and trusted partners — built to survive daily commutes, travel and years of use, at a fair price.

Designed down to the last detail

Every Bolsnik is built around how you actually carry — protective, organised and ready for whatever the day throws at it.

Polyester

Laptop compartment
Hidden pockets
External pockets
Water bottle holder
Single compartment
Built in compartments

Waterproof
Adjustable size
Anti theft
Lightweight
Internal padding

Shoulder strap
Backpack strap
Handle

Specifications coming soon.

Fast, fully tracked delivery worldwide with free shipping on every order, plus a tracking link the moment your order leaves us.

Materials & BuildHonest materials, made to last

Polyester

Smart OrganisationA place for everything

Laptop compartment
Hidden pockets
External pockets
Water bottle holder
Single compartment
Built in compartments

Laptop ProtectionYour tech, shielded

Waterproof
Adjustable size
Anti theft
Lightweight
Internal padding

Comfort & CarryBuilt for long days

Shoulder strap
Backpack strap
Handle

Care & WarrantyCarry with confidence

Specifications coming soon.

Ships WorldwideFree Worldwide Shipping

Fast, fully tracked delivery worldwide with free shipping on every order, plus a tracking link the moment your order leaves us.

built to last

From 4,500+ verified reviews:

0

87% say their Bolsnik survived a full year of daily commute — and still looks new.

0

Said the laptop sleeve fit their machine first try — no extra padding needed.

0

Said it's their go-to bag for both the office and weekend travel.

*Based on verified customer reviews collected 2025–2026 (n=327 with 12+ months of use). Individual results vary by use case.

Find Your Bolsnik Today

Why Customers Love Bolsnik

Modern, function-first backpacks
Carefully selected materials
Designed for everyday use
Minimal, elevated design
Trusted by a growing community worldwide

At Bolsnik, a bag is more than storage — it’s how you move, work and travel, and how you show up every day.

Thank you for being part of our journey. We’re excited to grow with you.

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Carry the Year.

Padded laptop sleeves. Ballistic nylon. Weatherproof zippers. Engineered to survive twelve months of daily classroom-to-commute carry — and still look new at graduation.

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Frequently asked questions

Bags built for work, travel and everyday carry. Premium materials, functional design, made to last.

Please read our FAQs page to find out more.

Yes. We accept returns within 30 days of delivery. Items must be unused, unworn, with tags attached, and in their original packaging.

Yes. Many models include padded laptop compartments designed for work, travel, or school use. Compatible laptop sizes are listed on each product page.

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