Hk Roll Top Backpack Stretchable Laptop Backpack 15.6 Inch USB Port Water Resistant Anti-Theft for School Work Weekend Travel (23L-28L Black). Product Dimensions: 16 x 30 x 60 cm; 1.02 kg. Are Batteries Included: No. Item Weight: 1.02 kg. Large expandable capacity: expandability is a clever design for this backpack with an external folding closure, with a variable volume of 23L when folded and expands to 28L when unfolded, demonstrating its practicality and versatility. The maximum size of the travel backpack in open form is 23.6X11.8×6.3” or 60x30x16 cm, and after folding 19.2X11.8×6.3” or 49x30x16 cm. Plenty of space for all your daily essentials, ideal for a short getaway. Ergonomics and ease of use: this stylish backpack boasts a sleek exterior design and a smart interior layout. Magical convenience: the exceptional convenience of this modern, waterproof backpack lies in the long zip on the left side, which runs from top to bottom, allowing you to quickly retrieve the items you need without having to open the top of the bag. The external folding design at the top of the backpack saves space, adding waterproofness and originality. Comfortable back: the separate laptop compartment, which can be opened 90° thanks to a fluid double zip, is concealed on the back of the city bag. The thick foam padding on the back not only ensures optimal comfort, but also protects your laptop (up to 15.6″) and tablet (up to 12.9″). The compartment is also equipped with a divider for A4 documents or papers. Fashionable design: not only does this smart backpack have a stylish design, it is also versatile, suitable for students, work, everyday life in the city, women’s shopping and short weekend trips, and even suitable for being carried on a plane, thanks to the fastening strap on the back to attach it to a suitcase.