Hikingworld Oxford Tactical Backpack Laptop Shoulder Bag Traveling Backpacking Trekking Camping Backpack Material: 800D Encryption Oxford fabric, high density, resistant to tears and abrasion, water-resistant and Utility. About 3cm Mesh padding is just great, after many hours of wearing a backpack, it helps to have the mesh that allows air flow to the skin to keep yourself relatively cool Pockets have plenty of zipper coverage that protects it from being easily opened. One of the Main pockets is perfect for the laptop and accessory, Outer smaller pocket great for quick access books, camera and what you need.outest small pockets are excellent for quick access . Designed with heavy duty zippers with pull cords, extremely durable. Fully adjustable contoured padded shoulder straps with hard plastic D-rings for attachments