WATERPROOF DESIGN: This 16-inch student backpack is made of waterproof material that protects your books, electronics, and other items from accidental rain and ensures that they stay dry at all times. ROLL-TOP CLOSURE: The unique roll-top closure design provides additional waterproofing and gives you greater flexibility to fit different sized items, making it ideal for use at school, while cycling or travelling. REFLECTIVE STRIP DESIGN: The backpack is equipped with reflective strips for improved visibility at night or in low-light conditions, adding to your safe riding and making you more visible on heavily trafficked streets. DESIGNED FOR RIDING: Designed with the needs of cyclists in mind, the backpack features a comfortable back ventilation system and convenient back support structure to ensure you stay comfortable while riding, while easy-to-access pockets store essential items. COMPUTER FRIENDLY: Equipped with a dedicated internal laptop compartment that can accommodate up to a 16-inch laptop and comes with a soft lining to provide extra protection for your electronic devices and peace of mind! Material: Microfibre synthetic leather, waterproof vegan leather Structure: Main pocket, wall pocket, zip pocket Size: 48*27*13.5 (rolled up) 62*27*13.5 (unrolled) Volume: 17.5L (rolled up) 22.5L (unfolded)