Bought two of these for my grandsons, green and blue.  They are the perfect size for little boys (and adults too).  They are well made and beautiful colors.  They are able to fit their water bottle, and other things little ones carry around without carrying their huge backpacks.  They just have to get used to putting it across their chest.  I think I will be ordering one for myself on my next order.  There is lots of room in them for a day trip.