Understand your concept. Do you have any idea what the mesh fabric should be? There too many different kinds of mesh. better to send us a clear picture for reference. I will check with our R&D department if available. By the way, do you have any test standard about chemical item? It’s not very difficult to make water resistant for fabric, but I’m not sure if it can pass your test standard. (for example, some European customer requests OEKO-TEX 100) In case we can provide you a sample, can you test it in the US?