External Dimensions:5¼ W x 2½ D x 8⅜ H  (13 x 6 x 21 cm)Weight: 9 oz. (255 g)

Tamrac photo backpacks are made from water-proofed materials and have giant rain flaps, so in general, they don't require a raincover. When extra security is desired, these M.A.S.™ Raincovers provide it with a double waterproof-coated PowerGrid™ nylon that protects everything except the back of the backpack and the harness. Folded in their pouch, they attach to any of the M.A.S.™ backpack attachment points.
For photo backpack Models 777, 787, 5258, 5577 and 5578
Color: Gray with black case