back packs 1.zipper pocket on bottom 2.side compression webbing 3.2 ... 21cmVolumn:30L+5LMaterial :600D ripstop,210D nylonSub-material:SBS ZIPPER,nylon webbingcolor: dark blue,black,green,red,Feature:1 ... .zipper pocket on bottom2.side compression webbing3.2 side bottle ... price with good service!shanghai aimika industrial and trading company,ltd. back packs