Foreign Object Debris prevention

Foreign Object Debris prevention
A friend is looking for some material choices and design specifications to use to cover and protect some aircraft engines and engine modules. The diameter of these engines vary from 87" up to 117". So they are kinda big, plus the cover would have to hang down the sides about 40" or so.

I am looking for some kind of fabric covering that would be most cost beneficial and effective. I’ve hear of Herculite materials http://www.herculite.com, but i think there must be something else (or better). Does anyone have any great ideas for material selection that would be durable, inexpensive, easily stored, accessible, and protective? Most these engines have all sorts of tubes, harnesses, and sharp metal sticking out the side. Im not afraid to say that this is completely out of my league…