SUNYOO&reg; 20L/35L Large Capacity Packable Handy Lightweight Laptop Backpack Waterproof Resistant Travel Daypack nylon Durable. Made with High Quality Water and Tear Resistant Nylon material. Durable Abrasion Resistant SBS Metal Zipper Avaliable. Multi Copartments. Features a classic shape with several pockets for storage and organization. 35L Backpack has a roomy main compartment,two front zipper pockets to hold small accessories,one internal security zippered pocket for valuable items and two side pockets for water bottle or umbrella. Comfortable to carry. 20+ Years Experience makes the Most Comfortable Wide Breathable Mesh Shoulder Straps. Easy to Adjust the length and lock firmly. High quality SBS Two-way zipper goes smoothly. Fashion design.Streamlined contracted design,full of outdoor sports atmosphere,on the principle of human body engineering design air exchange of bearing system,back pressure,create the most comfortable with experience. Lightweight and Roomy. A true space saver. Stuff the bag into its own pocket for storage---no extra fees, and unzip it when you reach your destination. Avoid overweight charges, simply unfold from your luggage and use it as a carry on for your excess baggage.