Packism Heavy Duty Clear Backpack with Reinforced Straps Where can be used: School or extra-curricular activities: books, stationery, water bottle, etc. Sporting events or Concert: clothes, umbrella, phone, etc. Airport or high security settings: laptop, notebook, purse, etc. Travel to the beach or zoo Who is the most appropriate: Unisex Students Office Workers Travelers Everyone who carry must-haves,etc. Warm Notices: It is a normal phenomenon for a little folds on the bag. They can be eliminated for several days use. Here are some tips to quickly remove the folds: Firstly please stuffed with things such as cloth in the bag for a while after receiving the backpack; Secondly please slightly heat the folds on the bag with a hair dryer(Warm mode) in 20 seconds, press the folds with hand to smooth them. 2. Please allow a little material smell which is a normal phenomenon. Just put the bag on an airy space for a while or use it for several days, the smell will disappear.