[SIGNAL APPAREL LETTERHEAD]





September 14, 1999

Mr. Evan Levine
Brown Simpson
152 West 57th Street
40th Floor
New York, New York 10019

         Re:      $5 Million Convertible Debt

Dear Mr. Levine:

     Reference is made to that certain Securities Purchase  Agreement,  dated as
of March 3, 1999 (the  "Purchase  Agreement"),  executed  between Signal Apparel
Company, Inc. ("Signal") and Brown Simpson Strategic Growth Fund, L.P. and Brown
Simpson  Strategic Growth Fund, Ltd. (the "Holders").  Reference is also made to
those  certain  5%  Convertible  Debentures,  each dated  March 3, 1999,  in the
original  principal  amounts of $1,750,000  and $ 3,250,000  (collectively,  the
"Debenture")  issued to the Holders by Signal in  connection  with the  Purchase
Agreement.  All  capitalized  terms  used in this  agreement  and not  otherwise
defined  herein  shall  have  the same  meaning  ascribed  to such  terms in the
Debenture and in the Purchase Agreement.

     An Event of Default  exists under  Section 3.1 of the Debenture as a result
of the failure by Signal to pay the interest thereon that became due and payable
on July 1, 1999.  Holders have certain  rights under the Debenture in connection
with such Event of Default.

     The Holders and Signal desire to amend the  Debenture in certain  respects.
In  consideration  of the  waiver by Holders  of the  existing  Event of Default
described above, the mutual promises set forth in this agreement,  and for other
good and valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, Holders and Signal hereby agree as follows:

                                     Page 1






1.   The last  paragraph on page 2 of the Debenture  which begins with the words
     "The principal of..." shall be amended in its entirety to read as follows:

     "The  principal  of, and interest on, this  Security are payable in coin or
     currency of the United States of America as at the time of payment is legal
     tender for payment of public or private  debts,  at the last address of the
     Holder last appearing on the Register."

2.   Concurrently with execution of this agreement,  Signal shall pay to Holders
     the sum of  $62,000  as  payment  in full of all  interest  due  under  the
     Debenture  as of July 1, 1999.  Holders  have not received any common stock
     certificates representing payment of such interest.

3.   Notwithstanding any provision in the Debenture or the Purchase Agreement to
     the contrary,  the Conversion Price shall remain at Two Dollars ($2.00) and
     shall not be adjusted (except as otherwise provided in the Debenture) until
     December 31, 1999 (the "Adjustment  Date").  On the Adjustment Date, at the
     option of Signal (to be exercised in writing),  the Conversion  Price shall
     be adjusted to One Dollar and Twenty Five Cents ($1.25);  provided that, on
     or before  the  Adjustment  Date,  a third  party  shall have  provided  to
     Signal's  lender not less than $10 million as collateral for new loans made
     to Signal on or before the Adjustment Date. If Signal has not, on or before
     the  Adjustment,  exercised the Conversion  Price option in accordance with
     the previous  sentence,  then, at the option of Holders (to be exercised in
     writing at any time after November 1, 1999),  the Conversion Price shall be
     adjusted to One Dollar ($1.00).

4.   Holders each hereby waive the existing Event of Default described above and
     any  Default  which  may now  exist  under the  Debenture  or the  Purchase
     Agreement;  provided  that Signal  shall have made the payment  required by
     paragraph 2.

5.   Except as specifically set forth herein,  no other changes or modifications
     to the Purchase Agreement or the Debenture are intended or implied, and, in
     other respects,  the Purchase Agreement and the Debenture shall continue to
     remain in full force and effect in accordance with its terms as of the date
     hereof.

6.   The terms and provisions of this agreement  shall be for the benefit of the
     parties  hereto  and their  respective  successors  and  assigns;  no other
     person,  firm,  entity or  corporation  shall  have any  right,  benefit or
     interest under this agreement.



                                     Page 2





7.   This  agreement  may be signed in  counterparts,  each of which shall be an
     original  and all of which taken  together  constitute  one  amendment.  In
     making  proof of this  agreement,  it shall not be  necessary to produce or
     account for more than one counterpart signed by the party to be charged.

8.   This  agreement  shall be governed by and construed in accordance  with the
     laws of the State of New York.

9.   This agreement  sets forth the entire  agreement and  understanding  of the
     parties with respect to the matters set forth herein. This agreement cannot
     be changed,  modified,  amended or terminated except in writing executed by
     the part to be changed.

                                          Very truly yours,

                                          SIGNAL APPAREL COMPANY, INC.


                                          By:      /s/ Howard Weinberg
                                                   ----------------------------
                                                   Howard Weinberg
                                                   CFO

ACKNOWLEDGED AND AGREED:

BROWN SIMPSON STRATEGIC GROWTH FUND, L.P.

By: Brown Simpson Asset Management LLC


         By:      /s/ Evan Levine
                  -----------------------
                  Evan Levine
                  Principal

BROWN SIMPSON STRATEGIC GROWTH FUND, Ltd.

By: Brown Simpson Capital, LLC
    Its General Partner

         By:      /s/ Evan Levine
                  -----------------------
                  Evan Levine
                  Principal