This messenger style bag is made from 600 D poly/canvas. This item features a contrasting colored front flap with a Velcro closure, a side mesh water bottle pocket, organizer pockets under the flap, a carrying handle on the top of the bag and an adjustable shoulder length carrying strap (adjusts from 22" to 41.75"). In addition there is a grommet on the front flap designed to run headphones through to a pocket under the flap designed to carry an mp3 player, so you can listen to your favorite music while you're on the go.