i received this bag a few days ago. to give some scale, it's like a tall brown paper grocery bag, but about 50% wider (longways). i EASILY fit two pais of climbing shoes, a harness, chalk bag, climbing helmet along with bottled water, some cliff bars and other odds and ends. the material is PVC, so it's flexible, yet holds it shape and is water resistant so I don't worry about liquids in there. it has an outer pocket that easily fits a phone, keys and wallet, as well as an inner pocket thats big enough for the food and water bottle. it has a zipper across the top so stuff stays in there. it comes with a good, wide strap that allows it to be worn like a messenger bag -very good. the description says "assorted colors". i kinda missed that and a silver one showed up -literally looks like duct tape or something -i would prefer black, but the silver was only just barely not annoying enough to send back. i wish the interior was silver as well -would make it easier to see inside the bag. i give it 4 stars. good bag if you're OK with the beach bag-ish shape.