This bike messenger style bag by Peets Coffee is black and detachable/adjustable straps that can be clipped on in different ways and reconfigured to secure to a bike, etc. The bag has one main compartment that has a zippered pocket inside that is big enough to fit a phone or wallet. It has a zippered closure (it looks like it may be a roll top), a waterproof coating, and has a bungie cord type of system on the front for additional storage. The bag has some wear from normal usage (see pictures for information about the condition of the bag).
The dimensions of the bag are 18 inches tall, 12.5 inches across and 7 inches wide (at the bottom of the bag). I have included a photo of the original tag for the bag that was included on another posting.