EX-99

                                                                    Exhibit 99.1
                           Excplanation of Responses

(1) Pro rata distribution from Warburg Pincus Ventures, L.P. to its limited
partners. As a part of this distribution, Warburg, Pincus Ventures, L.P. also
distributed 108,474 shares of Knoll, Inc. common stock to its general partner
Warburg Pincus Partners LLC. The shares distributed to Warburg Pincus Partners
LLC are not reflected in Table I as such shares continue to be owned by a
Warburg Pincus entity.

(2) The stockholders are Warburg, Pincus Ventures, L.P., a Delaware limited
partnership ("WPV"), Warburg Pincus & Co., a New York general partnership ("WP")
and Warburg Pincus Partners LLC, a New York limited liability company ("WPP").
The sole general partner of WPV is WPP, whose managing member is WP. Warburg
Pincus LLC, a New York limited liability company ("WP LLC" and together with
WPV, WPP and WP, the "Warburg Pincus Entities"), manages WPV. Charles R. Kaye
and Joseph P. Landy are Managing General Partners of WP and Managing Members of
WP LLC and may be deemed to control the Warburg Pincus Entities. Messrs. Kaye
and Landy disclaim beneficial ownership of all shares held by the Warburg Pincus
Entities. Jeffrey Harris, a director of Knoll, Inc., is a general partner of WP
and a managing director and member of WP LLC. All shares indicated as owned by
Mr. Harris are included because of his affiliation with the Warburg Pincus
Entities. By reason of such affiliation, Mr. Harris may be deemed to have an
indirect pecuniary interest within the meaning of Rule 16a-1 of the Securities
Exchange Act of 1934, as amended (the "Exchange Act"), in an indeterminate
portion of the shares reported herein. Mr. Harris disclaims "beneficial
ownership" of such shares within the meaning of Rule 13d-3 under the Exchange
Act.

EX-24

                                                                      Exhibit 24

                                POWER OF ATTORNEY

     The undersigned hereby constitutes and appoints each of Scott A. Arenare,
Timothy J. Curt and Steven G. Schneider, acting together or individually,
his/her true and lawful attorney-in-fact to:

(1)  execute for and on behalf of the undersigned Forms 3, 4 and 5, together
     with any amendments thereto, in accordance with the Securities Exchange Act
     of 1934, as amended, and the rules thereunder;

(2)  do and perform any and all acts for and on behalf of the undersigned which
     may be necessary or desirable to complete the execution of any such Forms
     and the filing thereof with the United States Securities and Exchange
     Commission and any other person as may be required by law; and

(3)  take any other action of any type whatsoever in connection with the
     foregoing which, in the opinion of such attorney-in-fact, may be of benefit
     to, in the best interest of, or legally required by, the undersigned, it
     being understood that the documents executed by such attorney-in-fact on
     behalf of the undersigned pursuant to this power of attorney shall be in
     such form and shall contain such terms and conditions as such
     attorney-in-fact may approve in his discretion.

     The undersigned hereby grants to each such attorney-in-fact full power and
authority to do and perform all and every act and thing whatsoever requisite,
necessary and proper to be done in the exercise of any of the rights and powers
herein granted, with full power of substitution or revocation, hereby ratifying
and confirming all that such attorney-in-fact, or his substitute or substitutes,
shall lawfully do or cause to be done by virtue of this power of attorney and
the rights and powers herein granted. The undersigned acknowledges that the
foregoing attorneys-in-fact, in serving in such capacity at the request of the
undersigned, are not assuming any of the undersigned's responsibilities to
comply with the Securities Exchange Act of 1934, as amended.

     This power of attorney shall continue in full force and effect until
revoked in writing by the undersigned or his/her attorney-in-fact.

     IN WITNESS WHEREOF, the undersigned has executed this Power of Attorney
this 15th day of May, 2004.

                                         Signature: /s/ Jeffrey A. Harris
                                                    ----------------------------

                                         Print Name: Jeffrey A. Harris