Tigernu Anti-Thief Design: Laptop is much safer as it covered by the shoulder straps. The invisible pocket in the back keeps the cellphone, wallet and other valuables safe and sound. After zipped up your backpack, the zippers can't be pierced even by a sharp knife Large Capacity & Well Organized: 12.99'' x 6.69" x 19.29" (L*W*H), fit for most laptops up to 15.6 Inch. Three Main Compartments with several functional pockets can help you organize your items better. This multi-functional day pack is perfect for business trips, short travel and College life etc Comfortable Ergonomic Design: The mesh layers is much softer than others and very skin-friendly. The S-shape shoulder straps and padded back provide perfect support and reduce stress. It's breathable with great air ventilation Durable & Water Resistant: Made of premium quality Oxford fabric and Polyester fabric lining. It's Water Repellent & Anti-Tear. The reinforced stitching also makes the backpack durable and long-lasting Humanization Design: Thickened Soft Handle for up to 40 kg loading; Adjustable Side Pocket; Smooth Zip which can be used for more than 16,000 rounds; Wearable Rubber Pad at the Bottom; Elastic Trolley String to go with your luggage etc