Multi Compartment: Main compartments and multiple pockets allow you to keep all of your gear secure and organized. The spacious main compartment holds clothes or other everyday essentials. The elastic cord is designed to store items that need to be easily accessible. In addition, it has two side pockets for your water bottle or umbrella. Comes with a removable pouch that can be hung on your chest or back for easy storage of frequently used items such as mobile phones. Portable: Perfect for traveling, hiking, cycling,camping and other outdoor activities. And it meets size requirements for most airlines, enough room for 2 or 3 days trips. Water-resistant: Made of high-quality and safe material, it is durable for long-time use.nylon fabric material, Made of High quality rip-stop polyester material, water resistant, tear resistant. Humanized Design: A breathable sponge is applied to the back to increase comfort.With the ultra light weight and wide shoulder straps, Breathable mesh shoulder straps which helps relieve the stress of shoulder.Padded and adjustable shoulder straps allow for a custom, comfortable fit,Padded mesh back panel for better comfort. Capacity: 30L, Size: 50*23*13cm (19.7*9*5.1inchs), Wtight:1lb This 30L hiking backpack is specially designed for Hiking enthusiasts. With the ergonomic design, this backpack gives you more comfortable feeling. The external hanging system has expanded the capacity of the backpack once again. Made of high-quality and safe material---900D nylon, it is durable for long-time use. It will surely contribute to your fantastic outdoor experience.