Thank you for viewing this product from among many others m(_ _)m This is a cylinder case from Oregonian Camper. I purchased it new and used it to store an oil lantern. The zipper is smooth and I think it's very clean. There is a little dirt on the bottom part from use, but it's not very noticeable and I don't think it affects the use at all. If you have any questions, please ask in the comments. I will investigate as much as possible.