The assault pack made of high quality Oxford material, which guarantees your long term use. Durable nylon material with waterproof coating inside to protect your items from getting wet inside in bad weather. The two thick strips of foam on the back help to release the pressure on the back, and the space between the back also helps the air to circulate so that you won't feel stuffy. Foam shoulder straps keep you comfortable even when it's heavily loaded. Water bottle mesh pockets on each side can store your water bottle, collapsible umbrella or your other small items. It's roomy and big enough to hold whatever you want to carry.