Color: Black Material: Oxford fabric Capacity: 56-75L Computer size: 16 inches Interior fabric: polyester Waterproofing: Waterproof 1. Adjustable design: the adjustable buckle can adjust the appropriate shoulder strap length according to body shape, which is convenient and quick. 2. Durable: the tension-resistant part of the shoulder strap is reinforced with thick threads, which are strong and firm, extending the bag's lifespan. 3. External USB interface system: there is a USB interface on the side of the backpack that can be charged, keeping your phone charged at all times, fashionable, convenient, and practical. 4. Ventilated back: the backpack uses a 3D breathable system, honeycomb mesh design, comfortable fabric, and strong breathability. [French company and brand TECH DISCOUNT]: Our company TECH DISCOUNT manufactures and sells this superior quality product compared to similar products on the market (Even if the photos are similar, they are not designed in the same way and sellers do not offer the same after-sales service). Each product undergoes strict quality control before shipping, allowing you to receive your product in excellent condition. In case of quality issues, we will provide a free exchange within 14 days. Shipped from France on the same day as the order and you will receive it as soon as possible (unlike other sellers who cannot guarantee shipping time or who ship from abroad and whose after-sales service is generally insufficient). Our after-sales service will be available to respond effectively to you. [To other sellers]: This product is sold exclusively under our French brand TECH DISCOUNT. It is prohibited to add this offer in your e-commerce website.