HongyuTing Laptop outdoor backpack Travel pack casual daypack Material:nylon,polyester 1.Large capacity: There are 3 compartments to meet your needs,(the main compartment, the second compartment with organizer panel, the third compartment),the main compartment can hold up to 15.6 inch laptop and some ultra-slim 17 inch laptop. 2.Ergonomic Design : Two zippered slide side pockets for bottle, umbrella or some small things while closed the zipper; Secret pockets at the back and in the front; A separated compartment with organizer panel and key chain to help you storage your small things (wallet, cell phone, pen, keys)easily. 3.Comfortable Strap Design:Airflow back system multi-panel airflow design provides extra padding for comfort and Maximum Back Support.And the top loop handle for a secure hold when picking up or moving the backpack. 4.Quality and Durability : Its durable and water-resistant nylon construction helps keep precious cargo safe and dry, easy to clean. And high quality of POLYSTER LINING makes this backpack more high-end. 5.Multipurpose Daypacks, the thoughtfully designed backpack is perfect for business trips or weekend getaways or for simply heading to the office or school and home again.