Super lines are here to stay and potentially the future in fishing lines. These lines are a braided line which is made up of a type of polyethylene that is extremely thin and extremely strong. It is similar to braided dacron in terms of sensitivity, however, it is only about 1/3 that of monofilament. Here is a great link to how Berkley explains their super lines as far as how they are made, what the benefits are and what the negatives are.
Popular Super Line Brands