A waterproof cast is a fiberglass cast put over a waterproof cast liner. The cast is not actually waterproof, it is water-resistant. The cast can get wet and the water will drain from the cast ...

A waterproof cast is a fiberglass cast put over a waterproof cast liner. The cast is not actually waterproof; it is water-resistant. The cast can get wet and the water will drain from the cast, ...