Men's Large Capacity Backpack, Business USB Charging Port Waterproof Laptop Backpack, Commuter Expandable Casual Reflective Dual-Use Bag with Trolley Strap, Black

【PAY ATTENTION】 · Clear pictures provide product details, colors, styles, specifications and other information to help you understand the product. · The above dimensions are measured manually, and there may be errors due to different personal measurement techniques. Please refer to the actual product for accurate measurement. · If you are interested in our products, you can add them to your shopping cart and place an order according to your personal preferences and needs. 【COLOR DIFFERENCE ISSUE】 · The color of the product will be affected by various factors such as shooting light source, post-production editing, and display resolution,etc. · There may be color difference. · Please refer to the actual product. 【VARIOUS CARRYING METHODS】 ·Hand-Carrying Mode: Equipped with a sturdy handle, easy to carry. This method is suitable for short trips or when you need to carry it quickly. ·Backpack Mode: Equipped with comfortable straps, you can carry it on your shoulders. This is great for long walks or when you need both hands free. ·Rolling Mode: Equipped with durable rollers and telescopic pull rods, it can be rolled like a trolley case. This method is suitable for heavy objects or situations that need to be moved for a long time. ·How to Carry Handbag: Equipped with a detachable handbag, which can be used alone or fixed on a luggage bag. This method makes it easy to carry extra items or carry-on items. 【POLYESTER FABRIC】 · Hand Wash or Machine Wash: For Most Polyester Fabric Backpacks, You Can Choose to Hand Wash or Machine Wash. Select a Gentle Washing Mode and Use Cold Water or Warm Water for Cleaning. · Thorough Rinsing: Ensure Thorough Rinsing of the Cleaning Agent to Avoid Residue on the Backpack. · Air Dry Naturally: Place the Backpack in a Well-Ventilated Area to Air Dry Naturally, Avoiding Direct Sunlight or Using Heat Sources Such as a Hairdryer. • Scientifically Expandable: This backpack features a modular compartment design with adjustable dividers and an expandable 3D space for intelligent capacity expansion. The main compartment includes a dedicated shockproof laptop sleeve, perfectly accommodating laptops and tablet devices. • Superior Waterproofing: Crafted from premium water-repellent coated fabric, the surface forms a water-beading layer with lotus-leaf effect. The inner lining employs high-density polyester weaving technology to effectively block rainwater penetration. • Pressure Relief: The back panel is designed to follow the spine's natural curvature, utilizing 3D mesh breathable foam and an adaptive aluminum alloy frame to evenly distribute weight across the waist. S-shaped, widened shoulder straps incorporate built-in shock-absorbing gel strips, working with an adjustable chest strap to create a triangular stability structure that maintains airflow even during extended wear. • Safe and Convenient: The integrated reflective warning system on the bag creates a dynamic light strip when walking at night. • Multi-functional: Innovative dual-mode carrying design. Beyond conventional backpack use, the hidden retractable handle kit and side carry handles form a versatile transport system. The rear luggage strap securely attaches to wheeled suitcases, while the front pocket's quick-access design enables one-handed retrieval of headphones and other essentials.