The Billingham 550 Original Shoulder Bag (Khaki with Tan Leather Trim) is designed to carry a medium format, large format or digital SLR camera and accessories. The case is constructed from soft-weave fabric which helps eliminate abrasions, combined with Stormblocker dual laminate waterproof canvas and a heavy-duty, closed cell foam padded interior. It has Superflex 10-15 and 10-18 partitions for organizing gear. There is a large rain flap which has buckle fastening.

The 550 bag has 2 full-height zippered pockets inside the main compartment, double bellowed front pockets with press stud fastenings, 2 removable end pockets and an external back pocket. It is carried by dual handles with overlapping leather grip or an adjustable, shoulder strap with an SP20 heavy-duty neoprene backed leather shoulder pad.