Multi Compartment :Generous main compartments and multiple pockets allow you to keep all of your gear secure and organized. The spacious main compartment holds sleepingbag, clothes, or other everyday essentials. With one Interior Pouch for water bladder. It also has a front pocket with a zipper. 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. PORTABLE:Perfect for traveling, hiking, cycling,camping and other outdoor activities. Reflective stripes on shoulder straps making it easier to identify at night, making it safe to travel. And it meets size requirements for most airlines, enough room for 3 or 4 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. and included extra rain cover pouch on the bottom pouch,prevent the water and dust into the backpack,protect your valuables from heavy rain and keep everything dry. 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: 40L, Size: 53*33*20cm(20.9*13*7.9inchs), Wtight:1.76lb