Dakine Backpack Union 23L blues 2015/16 Dakine Union Backpack is stylish and practical. The main pocket is fastened to a two-way zipper and inside is a pocket of max. 30 x 27 x 3.5 cm (15 "). The laptop backpack has a loop for carrying a backpack in hand and high quality YKK zippers, the material is 600D Polyester, volume is approx.