Originally Posted by
staehpj1
Not sure what the beckman covers look like, but the covers I had were a very simple design that was pretty close to one size fits all. Like I said the things are basically a big shower cap.
The Beckman covers were unique because they were made to fit his particular pannier sizes and designs, and they included a "vent" at the bottom to allow any water that might get in to drain. As such, they were more involved than your normal covers. Several people on my cross-country trip had just what you describe: shower cap-like rain covers. They worked fine.
Here is an example:
Rain covers - Lone Peak Packs - Quality Packs Made in the USA!