Bill; "I know cotton and nylon both absorb water and cause rust. Might there be a material (such as polyester) which does not absorb water, and also is "inedible" ??? :-) " Bill yes there is, it is called GoreTex and it is a great material for many uses. It does not absorb moisture and allows water vapor to travel in only one direction through it. I have no idea if it would work for string covers. Jim Bryant (FL)
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