A Cold Wall Mens Backpack. SKU: ACWUG062-DKGR. Barcode: 5059168116424. Color: Dark Grey. Size: 40 x 32 x 12 cm. A Cold Wall Mens Dark Grey Utility Backpack. Utility backpack by A Cold Wall made of nylon, featuring a double zipper closure, metal logo patch and two pockets with magnetic closure on the front, interior with two open flat pockets and one with zipper closure.