... timely 2012 Sling Backpacks 1,The Wave Custom Sling Backpack. A Great modern sling pack for a variety of ... , pen loop (pen not included), side mesh pocket for water bottle (not included). 3,This product is kid-friendly. ... can customized5,material:600D poly canvas,single strap,mono backpack,pen loops remarkThe price depends on the bag your ... of bags you want to do 2012 Sling Backpack with many pockets