Shoulder strap and back are made of breathable mesh padded that can provide you all day comfort. Adjustable strap allows you adjust length and wear bag in the front or back, and stays in place comfortably even while running. Can be used as sling backpack, crossbody bag, shoulder bag, sling pack, chest bag, travel bag, backpack purse, sling purse, hiking bag, working or business bag, suitable for office, school, outdoor, business and other occasions. Perfectly fit your body.