Everest Deluxe Sling Backpack Single One Strap Sporty Messenger Bag large zippered front pocket with organizer: detachable keychain ring, 2" wide mesh pocket, 2 pen/pencil slot pockets, clear window ID pocket, open pocket music audio port and music player pouch: easily carry your ipod, mp3 players and route your headphones through the audio port so you can listen to your favorite music on the go hands-free rear padded air mesh lining panel provides comfort, and adjustable wide padded shoulder strap with reflector stripes to help increase safety and visibility at night removable music player/cell phone zippered pouch on shoulder strap with audio port for head/earphones: no need to take the sling off to access your ipod or mp3 player Roomy main compartment: fits your larger items such as books, tablets & ipads with ease.