Store other accessories other than water on holiday days and enjoy your activities such as trekking, camping, outdoor festivals, bicycle riding, fishing, winter sports, personal running, cycling, jogging, etc. Made of a thin and soft mesh material for excellent breathability. Mesh construction on the back and shoulders quickly releases heat and allows you to use it comfortably even when you sweat, and your back can breathe while exercising. This is a running backpack that can be easily carried on your back.