Exhibit (d)(1)(T)

                                Andrew H. Meyers
                                 31 The Birches
                         Roslyn Estates, New York 11576

Kanders & Company, Inc.
Two Soundview Drive
Greenwich, CT 06830

Langer Partners, LLC
Two Soundview Drive
Greenwich, CT 06830

       Re: The Langer Biomechanics Group, Inc.; Exercise of Options; Loan

Dear Sirs:

      Reference is made to:

      (i) The Tender Offer  Agreement  (the "Tender Offer  Agreement"),  of even
      date herewith, by and among OrthoStrategies,  Inc., a New York corporation
      ("OS"),   OrthoStrategies   Acquisition  Corp.,  a  New  York  corporation
      ("OrthoStrategies"),  and The Langer  Biomechanics Group, Inc., a New York
      corporation ("Langer"),  pursuant to which OrthoStrategies will commence a
      tender  offer for shares of common  stock,  par value  $.02 per share,  of
      Langer ("Common Stock");

      (ii) A Letter Agreement (the "Funding Agreement"),  of even date herewith,
      among OS, Andrew H. Meyers ("Meyers"), Greg Nelson ("Nelson"), and Kanders
      & Company,  Inc., a New York  corporation  ("Kanders & Co."),  pursuant to
      which Meyers,  Nelson, and Kanders & Co. agree to fund the amount required
      to consummate the transactions  contemplated by the Tender Offer Agreement
      and related expenses in the amounts set forth in the Funding Agreement;

      (iii) The Option Agreement (the "Option"), of even date herewith,  between
      OS and Langer,  pursuant to which Langer granted OS, and OS's assigns, the
      right to purchase 1,400,000 shares of Common Stock at an exercise price of
      at least $1.525 per share; and

      (iv) A letter (the  "Commitment  Letter"),  dated December 20, 2000,  from
      State Bank of Long Island (the "Bank") to Meyers in which the Bank advised
      Meyers  that the Bank has  approved a line of credit for  general  working
      capital purposes in favor of Langer (the "Line of Credit"). The funding of
      the Line of Credit is subject to certain conditions,  including the pledge
      by Meyers of $500,000 of  collateral  acceptable  to the Bank (the "Meyers
      Collateral") and the signing of loan documentation.


      1. I hereby  confirm  that if the Bank does not fund the Line of Credit or
provide  other  funding  satisfactory  to each of you prior to the  Closing,  as
defined in the Tender Offer  Agreement,  immediately  upon the  Closing,  I will
either (i) purchase 325,000 shares of Common Stock pursuant to the Option,  (ii)
loan to Langer the  principal sum of $500,000,  bearing  interest at the rate of
prime  plus 1%,  for a period of six months  from the  Closing  Date on the same
terms  and  conditions  set forth in the  Commitment  Letter,  or (iii)  provide
$500,000 as collateral to induce a bank other than the Bank to fund a $1,000,000
line of credit for general working capital purposes in favor of Langer.

      2. I confirm  that I will take all  actions  required to be taken by me in
order to induce the Bank to fund the Line of  Credit,  including  providing  the
Meyers Collateral.

      3. I understand that Kanders & Co. is entering into the Funding  Agreement
in reliance upon this letter; accordingly, I agree that my obligations contained
herein shall be irrevocable.

      4. This letter  agreement  shall be shall be governed by and construed and
enforced in accordance with the laws of the State of New York (without regard to
the conflicts of laws provisions  thereof).  All actions and proceedings arising
in connection  with this letter  agreement  shall be tried and litigated only in
the federal  and state  courts  located in the County of New York,  State of New
York. I hereby irrevocably  submit to the exclusive  jurisdiction of such courts
for the purpose of any such action or proceeding.

      5. Any  provision of this letter  agreement  may be amended or waived,  if
such  amendment or waiver is in writing and signed by each of you. No failure or
delay in exercising any right,  power, or privilege hereunder shall operate as a
waiver  thereof nor shall any single or partial  exercise  thereof  preclude any
other or further exercise thereof or the exercise of any other right,  power, or
privilege.  The rights and remedies  provided for herein shall be cumulative and
not exclusive of any rights or remedies provided by law.

      6. If any term or provision of this  Agreement  contravenes  or is invalid
under  applicable law, this letter agreement shall be construed as if it did not
contain such term or provision.

                                      Sincerely,


                                      Andrew H. Meyers