PORTER / UPSIDE 3WAY BRIEFCASE PORTER navy backpack, olive interior. Features a double zipper. - Brand: PORTER - Color: Navy - Interior Color: Olive - Item No.: 532-17902 This series consists of 4 types, mainly a briefcase style that can be used vertically and horizontally, plus a sling shoulder bag that is easy to incorporate in off-scenes. The distinctive way the main zipper is attached to the entire bag allows for a wider opening compared to a regular 3-WAY briefcase, whether carried on the back or by hand. The main body fabric is made of 1680 denier thick-count Cordura Ballistic plain weave, and its high durability is its greatest feature, allowing you to use it with confidence for a long time in any situation. Please be sure to check the profile before asking any questions.