Men's Expandable Waterproof Polyester Laptop Backpack w/ USB 1

Men's Expandable Waterproof Polyester Laptop Backpack w/ USB 2

Men's Expandable Waterproof Polyester Laptop Backpack w/ USB 3

Men's Expandable Waterproof Polyester Laptop Backpack w/ USB 4

Men's Expandable Waterproof Polyester Laptop Backpack w/ USB 5

Men's Expandable Waterproof Polyester Laptop Backpack w/ USB 6

Men's Expandable Waterproof Polyester Laptop Backpack w/ USB

On a gray, drizzly morning you sling this men's expandable waterproof polyester laptop backpack over your shoulder, feeling the sleek, tough fabric keep your tech dry and safe. It opens wide when you need more room, tucks away cords and cards in neat pockets, and lets you charge on the go with a built‑in USB port and padded laptop sleeve. From busy trains to café chats and airport runs, it keeps you light, tidy, and ready to go.

Place of Origin:

China

Samples:

$18.0/piece | Min. order : 1 piece

Shipping:

Support Sea freight

Payments:

L/C,D/A,D/P,T/T,Western Union,MoneyGram,OA

Lead Time:

1-1000(pieces):31(days),>1000(pieces):To be negotiated(days)

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capacity

20-39 Litre

lining material

POLYESTER

handle/strap type

soft handle

carrying system

Physiological Curve Back

interior

Interior Zipper Pocket

type

Softback

gender

Unisex

closure type

Zipper

Main Material

Polyester

Pattern Type

Customized

Application

Daily

style

fashion

feature

Waterproof

place of origin

Zhejiang, China

Expandable Waterproof Organized USB-Ready

Men Bag built from waterproof polyester protects your laptop and gadgets with padded interior compartments, secure zipper closure, and an integrated USB charging port for on-the-go power. Its smart rectangular silhouette expands to a 20–39 L capacity, features a soft handle, ergonomic physiological-curve back and customized fashion pattern for comfortable, stylish daily carry. Durable construction, neat retail packaging options and responsive sample/order support give commuters and professionals reliable quality and easy procurement for travel or daily use.

Expandable Waterproof Charging Backpack

This Men Bag is an expandable, waterproof polyester laptop backpack with a zipper closure and external USB charging port, offering a 20–39 L capacity and a padded laptop compartment for daily commuting. Fashionable and unisex with customizable patterns, it combines durable polyester construction and lining with a soft handle and a physiological curve back for ergonomic, comfortable wear. Functional interior zipper pockets and organizer slots, a softback structure, and reliable water-resistant protection deliver practical value for work, travel, and everyday use.

Waterproof Expandable Laptop Backpack

This Men Bag is an expandable waterproof polyester laptop backpack with a convenient USB charging port and secure zipper closure, designed for daily use and a 20–39 litre capacity. The fashion-forward softback design features a physiological curve back, soft handle and interior zipper pocket for organized storage. Made in Zhejiang, China with polyester lining and customizable pattern options, it blends durable construction and practical carrying features for commuters and travelers.

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Expandable Waterproof Durable USB-Ready

Crafted by a performance-driven label, this Men Bag blends rugged waterproof polyester with reinforced stitching and a padded laptop sleeve to protect devices on daily commutes and travel. Its expandable design adds instant capacity, while the built-in USB charging port, multiple organizational pockets, and a discreet anti-theft back pocket keep gear charged, organized, and secure. Lightweight yet durable, with breathable shoulder straps, smooth zippers, and a luggage-strap for easy travel, it balances professional style and everyday utility.

Material introduction

This backpack is constructed from durable, waterproof polyester with a polyester lining and sturdy zipper closures to keep gear dry and secure. Reinforced stitching, a soft handle and a physiologically curved back panel combine with padded interior zipper pockets to protect a laptop and maintain carrying comfort. With an expandable 20–39 L capacity, integrated USB port and abrasion-resistant fabric, this Men Bag offers tech-ready functionality and easy low-maintenance care.

◎ Introducing the Men's Expandable Waterproof Polyester Laptop Backpack w/ USB

◎ Waterproof polyester exterior

◎ Polyester lining

FAQ

How do I use the external USB charging port on the backpack?

The external USB port is a pass-through for charging only — plug your power bank into the internal cable inside the backpack, then connect your phone or device to the external port with your charging cable. The backpack does not provide power by itself, so keep the power bank charged and stored in an internal pocket while using the port.

What size laptop will fit in this backpack and how should I protect it?

This backpack fits most standard laptops (including common 15.6-inch models), but you should measure your laptop to be sure. Place your laptop in the dedicated laptop compartment or sleeve inside, and avoid overstuffing surrounding pockets so the device sits flat and secure. For extra protection during travel, use a slim padded laptop sleeve inside the backpack.

How does the expandable feature work and when should I use it?

The expandable section typically opens with an extra zipper or gusset to increase the pack’s depth and carrying capacity. Use the expansion when you need more space for clothes, books, or bulkier items on trips, and keep it zipped closed for a slimmer profile during daily commuting to reduce movement and bulk.

Is the backpack waterproof — can I use it in heavy rain?

The polyester material and coatings provide water resistance to protect your gear from light rain and splashes. However, it is not designed to be fully submersible; for prolonged heavy rain or standing water, use an additional rain cover or keep sensitive electronics in waterproof pouches for added protection.

Can I use this backpack for work, travel, school, and the gym? Any packing tips?

Yes — it’s versatile for daily commuting, business trips, school, and gym use. Organize tech in the laptop compartment, keep cables and power bank in small interior pockets, and separate gym clothes or shoes in a bottom pocket or a removable bag. When traveling, pack heavier items closest to your back for comfort and use the expandable section only when you need extra room.

How should I clean and maintain the backpack, and are there travel safety rules I should know?

Spot-clean with a damp cloth and mild soap; avoid machine washing, high heat, bleach, or ironing. Air-dry completely before storing. For air travel, keep lithium power banks in your carry-on (not checked baggage) and follow airline capacity limits (typically under 100 Wh without airline approval). Also check zippers and seams regularly and avoid overloading the pack to preserve shape and longevity.

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