Someone had asked about this seller a few weeks ago, and I had just ordered a wetbag from her. It came, and it's beautiful. She has some really nice fabric choices. The inner is a substantial waterproof lining, it zips closed, and it has a hanging strap that snaps at one end. I used it last weekend and left it in a hot car most of the time with no issues as far as smell, leakage, etc. I washed it over this week and plan to use it again this weekend.
Just because I like the fabric, here's a pic from her Etsy site: