# Men’s Flap School & Commuter Backpack

## Men’s Flap School & Commuter Backpack

Designed for school, commuting and everyday carry, this structured flap backpack combines a clean urban look with practical storage. The exterior uses PU leather for an easy-care finish, while the main zip compartment helps keep daily essentials secure. The Black colour option is also a strong match for shoppers looking for a **black rucksack backpack** with a more refined, everyday style.

### Key Features

-   **PU leather construction:** a smooth, easy-care exterior with a polished casual look.
-   **Organized interior:** includes a zipper pocket and a dedicated computer/laptop pocket.
-   **Flap-and-buckle styling:** adds a classic rucksack-inspired appearance while the main compartment uses a zipper closure.
-   **Everyday capacity:** 20–35 L capacity for school supplies, work essentials and daily carry.
-   **Three colour options:** Black, Dark Brown and Light Brown.

![Three-Box BL3514 PU leather flap backpack detail view](https://threeboxvietnam.com/wp-content/uploads/2019/04/Balo-da-Three-Box-BL3514-threeboxvietnam-8-scaled-e1606320854188-1000x1250.jpg)

![Three-Box BL3514 backpack construction and design detail](https://threeboxvietnam.com/wp-content/uploads/2019/04/Balo-da-Three-Box-BL3514-threeboxvietnam-12-1000x1250.jpg)

### Product Details

Model

BL3514

Material

PU leather

Dimensions

30 × 40 × 12 cm

Capacity

20–35 L

Internal storage

Zipper pocket and computer/laptop pocket

Main opening

Zipper

Colours

Black, Dark Brown, Light Brown

### Made for Daily Use

The BL3514 works well as a school backpack, commuter backpack or casual day bag. Its laptop pocket separates a computer from smaller accessories, while the zip pocket helps organize items such as keys, cables and other essentials. The flap silhouette gives it a more finished appearance than a basic fabric backpack without claiming to be genuine leather.

**Delivery:** Free shipping on orders over $25 to Canada & USA — delivered in 4–7 business days.

Shop with confidence with EX-STOCK Canada’s 90-day return policy. [View the return policy](/policies/refund-policy) or browse more options in our [school bags and backpacks collection](/collections/school-bags-backpacks).

### Frequently Asked Questions

Is this genuine leather?

No. The verified material is PU leather.

Does it have a laptop compartment?

Yes. The interior includes a dedicated computer/laptop pocket.

What are the backpack dimensions?

The verified dimensions are 30 × 40 × 12 cm.

Is it available as a black rucksack backpack?

Yes. Black is one of the available colour options, along with Dark Brown and Light Brown.

What is the model number?

This listing is for model BL3514.

## Details

- **Price:** 151.99 CAD
- **Vendor:** EX-STOCK
- **Type:** Backpack

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Black | 151.99 CAD | In stock |
| Dark brown | 151.99 CAD | In stock |
| Light Brown | 151.99 CAD | In stock |

## Images

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- 7683dbbeede58cf9f0cb8ce6d64e4240
- 872c2f4e1078f5d58352d52b46061038

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> Source: [EX-STOCK Canada](https://www.ex-stock.com/products/threebox-backpack-trend-mens-bag-backpack-fashion-school-bag-student-back-computer-bag-3514)
> Updated: 2026-08-28