AEARO COMPANY I BYLAWS AS AMENDED THROUGH SEPTEMBER 1, 2004 ARTICLE I MEETING OF STOCKHOLDERS Section 1. Place of Meeting and Notice. Meetings of the stockholders of the Corporation shall be held at such place either within or without the State of Delaware as the Board of Directors may determine. Section 2. Annual and Special Meetings. Annual meetings of stockholders shall be held, at a date, time and place fixed by the Board of Directors and stated in the notice of meeting, to elect a Board of Directors and to transact such other business as may properly come before the meeting. Special meetings of the stockholders may be called by the President for any purpose and shall be called by the President or Secretary if directed by the Board of Directors or requested in writing by the holders of not less than 25% of the capital stock of the Corporation. Each such stockholder request shall state the purpose of the proposed meeting. Section 3. Notice. Except as otherwise provided by law, at least 10 and not more than 60 days before each meeting of stockholders, written notice of the time, date and place of the meeting, and, in the case of a special meeting, the purpose or purposes for which the meeting is called, shall be given to each stockholder. Section 4. Quorum. At any meeting of stockholders, the holders of record, present in person or by proxy, of a majority of the Corporation's issued and outstanding capital stock shall constitute a quorum for the transaction of business, except as otherwise provided by law. In the absence of a quorum, any officer entitled to preside at or to act as secretary of the meeting shall have power to adjourn the meeting from time to time until a quorum is present. Section 5. Voting. Except as otherwise provided by law, all matters submitted to a meeting of stockholders shall be decided by vote of the holders of record, present in person or by proxy, of a majority of the Corporation's issued and outstanding capital stock. ARTICLE II DIRECTORS Section 1. Number, Election and Removal of Directors. The number of Directors that shall constitute the Board of Directors shall be not less than one nor more than fifteen. The first Board of Directors shall consist of nine Directors. Thereafter, within the limits specified above, the number of Directors shall be determined by the Board of Directors or by the stockholders, except as otherwise provided in agreements among stockholders of the Corporation to which the Corporation is party. The Directors shall be elected by the stockholders at their annual meeting. Except as otherwise provided in agreements among stockholders of the Corporation to which the Corporation is party, vacancies and newly created directorships resulting from any increase in the number of Directors may be filled by a majority of the Directors then in office, although less than a quorum, or by the sole remaining Director or by the stockholders. A Director may be removed with or without cause by the stockholders, except as otherwise provided in agreements among stockholders of the Corporation to which the Corporation is party. Section 2. Meetings. Regular meetings of the Board of Directors shall be held at such times and places as may from time to time be fixed by the Board of Directors or as may be specified in a notice of meeting. Special meetings of the Board of Directors may be held at any time upon the call of the President and shall be called by the President or Secretary if directed by the Board of Directors. Notice of each special meeting of the Board of Directors stating the place, date and time of the meeting shall be sent to each Director either by mail not less than four days before the date of such meeting or by telephone, facsimile or electronic mail not less than 48 hours before such meeting. A meeting of the Board of Directors may be held without notice immediately after the annual meeting of the stockholders. Notice need not be given of regular meetings of the Board of Directors. Section 3. Quorum. A majority of the total number of Directors shall constitute a quorum for the transaction of business. If a quorum is not present at any meeting of the Board of Directors, the Directors present may adjourn the meeting from time to time, without notice other than announcement at the meeting, until such a quorum is present. Unless a number greater than a simple majority is required by law, the Certificate of Incorporation of the Corporation, these Bylaws or any contract or agreement to which the Corporation is a party, the act of a majority of the Directors present at any meeting at which there is a quorum shall be the act of the Board of Directors. Section 4. Committees of Directors. The Board of Directors may, by resolution adopted by a majority of the whole Board, designate one or more committees, including without limitation an Executive Committee, to have and exercise such power and authority as the Board of Directors shall specify, except as otherwise provided in agreements among stockholders of the Corporation to which the Corporation is party. In the absence or disqualification of a member of a committee, the member or members thereof present at any meeting and not disqualified from voting, whether or not he or they constitute a quorum, may unanimously appoint another Director to act at the meeting in place of any such absent or disqualified member, except as otherwise provided in agreements among stockholders of the Corporation to which the Corporation is party. ARTICLE III OFFICERS The officers of the Corporation shall consist of a President, a Secretary, a Treasurer and such other additional officers with such titles as the Board of Directors shall determine, all of whom shall be chosen by and shall serve at the pleasure of the Board of Directors. Such officers shall have the usual powers and shall perform all the usual duties incident to their respective offices. All officers shall be subject to the supervision and direction of the Board of Directors. The authority, duties or responsibilities of any officer of the Corporation may be suspended by the President with or without cause. Any officer elected or appointed by the Board of Directors may be removed by the Board of Directors with or without cause. ARTICLE IV INDEMNIFICATION Section 1. Power to Indemnify in Actions. Suits or Proceedings Other than Those by or in the Right of the Corporation. Subject to Section 4 of this Article IV, the Corporation shall indemnify any person who was or is a party or is threatened to be made a party to any threatened, pending or completed action, suit or proceeding, whether civil, criminal, administrative or investigative (other than an action by or in the right of the Corporation) by reason of the fact that he or she is or was a director, officer, employee or agent of the Corporation, or is or was serving at the request of the Corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise, against expenses (including attorneys' fees), judgments, fines and amounts paid in settlement actually and reasonably incurred by him or her in connection with such action, suit or proceeding if he or she acted in good faith and in a manner he or she reasonably believed to be in or not opposed to the best interests of the Corporation, and, with respect to any criminal action or proceeding, had no reasonable cause to believe his or her conduct was unlawful. The termination of any action, suit or proceeding by judgment, order, settlement, conviction or upon a plea of nolo contender or its equivalent, shall not, of itself, create a presumption that the person did not act in good faith and in a manner which he or she reasonably believed to be in or not opposed to the best interests of the Corporation, and, with respect to any criminal action or proceeding, had reasonable cause to believe that his or her conduct was unlawful. Section 2. Power to Indemnify in Actions, Suits or Proceedings bv or in the Right of the Corporation. Subject to Section 4 of this Article IV, the Corporation shall indemnify any person who was or is a party or is threatened to be made a party to any threatened, pending or completed action or suit by or in the right of the Corporation to procure a judgment in its favor by reason of the fact that he or she is or was a director, officer, employee or agent of the Corporation, or is or was serving at the request of the Corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise against expenses (including attorneys' fees) actually and reasonably incurred by him or her in connection with the defense or settlement of such action or suit if he or she acted in good faith and in a manner he or she reasonably believed to be in or not opposed to the best interests of the Corporation; except that no indemnification shall be made in respect of any claim, issue or matter as to which such person shall have been adjudged to be liable for gross negligence or willful misconduct to the Corporation unless and only to the extent that the Court of Chancery or the court in which such action or suit was brought shall determine upon application that, despite the adjudication of liability but in view of all the circumstances of the case, such person is fairly and reasonably entitled to indemnity for such expenses which the Court of Chancery or such other court shall deem proper. Section 3. Entitlement to Indemnification. Notwithstanding the other provisions of this Article IV, to the extent that a director, officer, employee or agent of the Corporation has been successful on the merits or otherwise, including without limitation the dismissal of an action without prejudice, in the defense of any action, suit or proceeding referred to in Sections 1 and 2 above, or in the defense of any claim, issue or matter therein, that person shall be indemnified against all costs, charges and expenses (including attorneys' fees) actually and reasonably incurred by that person or on that person's behalf in connection therewith. Section 4. Authorization of Indemnification. Any indemnification under this Article IV (unless ordered by a court) shall be made by the Corporation unless a determination is made (i) by the Board of Directors by a majority vote of a quorum consisting of directors who were not parties to such action, suit or proceeding, or (ii) if such a quorum is not obtainable, or, even if obtainable a quorum of disinterested directors so directs, by independent legal counsel in a written opinion, or (iii) by the stockholders, that indemnification of the director, officer, employee or agent is not proper because that person has not met the applicable standards of conduct set forth in Sections 1 and 2 above. Section 5. Good Faith Defined. For purposes of any determination under this Article IV, a person shall be deemed to have acted in good faith and in a manner he or she reasonably believed to be in or not opposed to the best interests of the Corporation, or, with respect to any criminal action or proceeding, to have had no reasonable cause to believe his or her conduct was unlawful, if his or her action is based on the records or books of account of this Corporation or another enterprise, or on information supplied to him or her by the officers of the Corporation or another enterprise in the course of their duties, or on the advise of legal counsel for the Corporation or another enterprise or on information or record given or reports made to the Corporation or another enterprise by an independent certified public accountant or by an appraiser or other expert selected with reasonable care by the Corporation or another enterprise. The term "another enterprise" as used in this Section 5 shall mean any other corporation or any partnership, joint venture, trust or other enterprise of which such person is or was serving at the request of Corporation as a director, officer, employee or agent. The provisions of this Section 5 shall not be deemed to be exclusive or to limit in any way the circumstances in which a person may be deemed to have met the applicable standard of conduct set forth in Sections 1 and 2 of this Article IV, as the case may be. Section 6. Indemnification by a Court. Notwithstanding any contrary determination in the specific case under Section 4 of this Article IV, and notwithstanding the absence of any determination thereunder, any director, officer, employee or agent may apply to any court of competent jurisdiction in the State of Delaware for indemnification to the extent otherwise permissible under Sections 1 and 2 of this Article IV. The basis of such indemnification by a court shall be a determination by such court that indemnification of the director, officer, employee or agent is proper in the circumstances because he or she has met the applicable standards of conduct set forth in Sections 1 and 2 of this Article IV, as the case may be. Notice of any application for indemnification pursuant to this Section 6 shall be given to the Corporation promptly upon the filing of such application. Section 7. Advance of Costs, Charges and Expenses. Costs, charges and expenses (including attorneys' fees) incurred by a person referred to in Sections 1 and 2 above in defending a civil or criminal action, suit or proceeding (including investigations by any government agency and all costs, charges and expenses incurred in preparing for any threatened action, suit or proceeding) shall be paid by the Corporation in advance of the final disposition of such action, suit or proceeding: provided however, that the payment of such costs, charges and expenses incurred by a director or officer in that person's capacity as a director or officer (and not in any other capacity in which service was or is rendered by such person while a director or officer) in advance of the final disposition of such action, suit or proceeding shall be made only upon receipt of an undertaking by or on behalf of the director or officer to repay all amounts so advanced in the event that it shall ultimately be determined that such director or officer is not entitled to be indemnified by the Corporation as authorized in this Article IV; provided however, that nothing herein shall require the Corporation to indemnify or advance expenses to any person in connection with any action, suit, proceeding, claim or counterclaim initiated by or on behalf of such person. No security shall be required for such undertaking and such undertaking shall be accepted without reference to the recipient's financial ability to make repayment. The repayment of such charges and expenses incurred by other employees and agents of the Corporation which are paid by the Corporation in advance of the final disposition of such action, suit or proceeding as permitted by this Section 7 may be required upon such terms and conditions, if any, as the Board of Directors deems appropriate. The Board of Directors may, in the manner set forth above, and subject to the approval of such director, officer, employee or agent of the Corporation, authorize the Corporation's counsel to represent such person, in any action, suit or proceeding, whether or not the Corporation is party to such action, suit or proceeding. Section 8. Procedure for Indemnification. Any indemnification under Sections 1, 2 or 3 or advance of costs, charges and expenses under Section 7 of this Article IV shall be made promptly, and in any event, within sixty (60) days, upon the written request of the director, officer, employer or agent directed to the Secretary of the Corporation. The right to indemnification or advances granted in this Article IV shall be enforceable by the director, officer, employer, or agent in any court of competent jurisdiction if the Corporation denies such request, in whole or part, or if no disposition thereof is made within sixty (60) days. Such person's costs and expenses incurred in connection with successfully establishing that person's right to indemnification or advances, in whole or in part, in any such action shall also be indemnified by the Corporation. It shall be a defense to any such action (other than an action brought to enforce a claim for advance costs, charges and expenses under Section 7 of this Article IV where the required undertaking, if any, has been received by the Corporation) that the claimant has not met the standard of conduct set forth in Sections 1 or 2 of this Article IV, but the burden of proving such standard of conduct has not been met shall be on the Corporation. Neither the failure of the Corporation (including its Board of Directors, its independent legal counsel and its stockholders) to have made such a determination prior to the commencement of such action that indemnification of the claimant is proper in the circumstances because he or she has met the applicable standard of conduct set forth in Sections 1 and 2 of this Article IV, nor the fact that there has been an actual determination by the Corporation (including its Board of Directors, its independent legal counsel and its stockholders) that the claimant has not met such applicable standard, shall be a defense to the action or create a presumption that the claimant has not met the applicable standard of conduct. Section 9. Non-Exclusivity of Indemnification and Advancement of Expenses. The indemnification and advancement of expenses provided by or granted pursuant to this Article IV shall not be deemed exclusive of any other rights to which those seeking indemnification or advancement of expenses may be entitled under any Bylaw, agreement, contract, vote of stockholders or disinterested directors or pursuant to the direction (howsoever embodied) of any court of competent jurisdiction or otherwise, both as to action in his or her official capacity and as to action in another capacity while holding such office, it being the policy of the Corporation that indemnification of the persons specified in Sections 1 and 2 of this Article IV shall be made to the fullest extent permitted by law. The provisions of this Article IV shall not be deemed to preclude the indemnification of any person who is not specified in Sections 1 or 2 of this Article IV but whom the Corporation has the power or obligation to indemnify under the provisions of the General Corporation Law of the State of Delaware, or otherwise. Section 10. Insurance. The Corporation may purchase and maintain insurance on behalf of any person who is or was a director, officer, employee or agent of the Corporation, or is or was serving at the request of the Corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise against any liability asserted against him or her and incurred by him or her in any such capacity, or arising out of his or her status as such, whether or not the Corporation would have the power or the obligation to indemnify him or her against such liability under the provisions of this Article IV. Section 11. Meaning of 'Corporation' for Purposes of Article IV. For purposes of this Article IV, references to "the Corporation" shall include, in addition to the resulting corporation, any constituent corporation (including any constituent of a constituent) absorbed in a consolidation or merger which, if its separate existence had continued, would have had power and authority to indemnify its directors, officers and employees or agents, so that any person who is or was a director, officer, employee or agent of such constituent corporation, or is or was serving at the request for such constituent corporation as director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise, shall stand in the same position under the provisions of this Article IV with respect to the resulting or surviving corporation as he she would have with respect to such constituent corporation if its separate existence had continued. Section 12. Survival of Indemnification and Advancement of Expenses. The indemnification and advancement of expenses provided by, or granted pursuant to, this section shall, unless otherwise provided when authorized or ratified, continue as to a person who has ceased to be a director, officer, employee or agent and shall inure to the benefit of the heirs, executors and administrators of such a person. ARTICLE V GENERAL PROVISIONS Section 1. Notices. Whenever any statute, the Certificate of Incorporation or these Bylaws require notice to be given to any Director or stockholder, such notice may be given in writing by mail, addressed to such Director or stockholder at his address as it appears on the records of the Corporation, with postage thereon prepaid. Such notice shall be deemed to have been given when it is deposited in the United States mail. Notice to Directors may also be given by telephone, facsimile or electronic mail. Section 2. Fiscal Year. The fiscal year of the Corporation shall be fixed by the Board of Directors.