2012 Sling Backpack 1,High quality ,best price 2,any size,design,color can customized 3,enough supply ability,sample timely 2012 Sling Backpacks 1,The Wave Custom Sling Backpack. A Great modern sling pack for a variety of uses. 2,Two zippered compartments to store all accessories, adjustable shoulder straps, pen loop (pen not included), side mesh pocket for water bottle (not included). 3,This ...