I WAS LOOKING FOR A SMALL BUT DURABLE BACKPACK FOR MY 4 1/2 YEAR OLD TO START KINDERGARTEN WITH.I FOUND THIS ONE AT AN REI STORE AND LOVED IT SO I DECIDED TO CHECK OUT AMAZON AND THEY HAD IT FOR LESS PLUS MY SON LOVED THE COOL BIKER DESIGN.IT IS A PEFECT FIT AND IS ROOMY WITH ONE LARGE ZIPPERED OPENING AND ONE MEDIUM,PLUS TWO SIDE MESH HOLDERS,PERFECT FOR WATER BOTTLES/SNACKS.KELTY MAKES GREAT PRODUCTS...YOU WONT BE DISAPPOINTED.