Bange BG-2517 Men Business Backpack with USB Port, Size: 48 x 31 x 16cm, 48 x 31 x 16cm(Black), 48 x 31 x 16cm(Grey)1. Water repellent fabric, easy care 2. Can accommodate 15. 6 inch laptops (not included); large capacity to meet daily storage needs 3. Multiple compartments for neat and orderly storage 4. Rainproof USB interface, easy to use 5. The zipper opens and closes smoothly, not stuck, easy to use 6. The shoulder strap has eyeglass hooks and card pockets, multiple functions in one 7. Sponge mesh back, breathable 8. Weight: 1350g 9. Size: 31x16x48cm