tonlen heavy duty kids book bag school backpack and lunch bag set for girls (red) tonlen dimension: backpack: 11.4"*5.5"*17.7" (length*thickness*height), lunch bag: 9.0"*6.3"*9.4" (length*thickness*height)<br> backpack details:<br> fabric: polyester <br> lining: polyester<br> how many pocket?<br> one main pocket, one mid pocket, one front pocket and two side pockets.<br> inner structure?<br> the main pocket has an interlayer and a zipper closure slot. <br> how about the straps?<br> ergonomics shape strap with soft sponge <br> what can hold?<br> book, textbook, ipad, laptop etc. <br> lunch bag details: <br> fabric: linen<br> lining: aluminum foil<br> function: thermal insulation, cold insulation <br>