Exhibit 99.1

                            Explanation of Responses

(2) Mr. Amos directly owns 300 Class A membership units of PP Holding, LLC, a
Delaware limited liability company ("PPH"), representing approximately .21% of
the outstanding membership interests of PPH. On May 22, 2008, PPH distributed an
aggregate of 10,442,132 shares of Polypore International, Inc. Common Stock
("Common Stock") to its members (the "LLC Distribution"), including 22,113
shares of Common Stock to Mr. Amos, which distribution was made on a pro rata
basis with no consideration being paid to PPH in connection therewith. Following
the LLC Distribution, PPH directly owns 10,442,132 shares of Common Stock.
Because Mr. Amos is not a controlling member of PPH and because Mr. Amos does
not have or share investment control over the shares of the Issuer's common
stock owned by PPH, Mr. Amos has no pecuniary interest in such shares of the
Issuer's common stock within the meaning of Rule 16a-1(a)(2) under the
Securities Exchange Act of 1934.