POWER OF ATTORNEY

      Know all by these presents that the undersigned hereby constitutes and
appoints Jesse B. Debban, signing singly, as the undersigned's true and lawful
attorney-in-fact, and Parker B. Phillips, signing singly, as the undersigned's
agent to:

      (1)    execute for and on behalf of the undersigned, in the undersigned's
             capacity as an officer or director or 10% beneficial owner of Levi
             Strauss & Co. (the "Company"), Forms 3, 4 and 5 in accordance with
             Section 16(a) of the Securities Exchange Act of 1934 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 and
             execute any such Form 3, 4, or 5, complete and execute any
             amendment or amendments thereto, and timely file such form with the
             United States Securities and Exchange Commission and any stock
             exchange or similar authority; 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 such
             attorney-in-fact's discretion.

      The undersigned hereby grants to such attorney-in-fact full power and
authority to do and perform any and every act and thing whatsoever requisite,
necessary, or proper to be done in the exercise of any of the rights and powers
herein granted, as fully to all intents and purposes as the undersigned might or
could do if personally present, with full power of substitution or revocation,
hereby ratifying and confirming all that such attorney-in-fact, or such
attorney-in-fact's 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 attorney-in-fact, in
serving in such capacity at the request of the undersigned, are not assuming,
nor is the Company assuming, any of the undersigned's responsibilities to comply
with Section 16 of the Securities Exchange Act of 1934.  This Power of Attorney
shall remain in full force and effect until the undersigned is no longer
required to file Forms 3, 4, and 5 with respect to the undersigned's holdings of
and transactions in securities issued by the Company, unless earlier revoked by
the undersigned in a signed writing delivered to the foregoing attorney-in-fact.


      IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to
be executed as of this 18th day of October, 2019.


                                        /s/ Walter J. Haas
                                       --------------------------------
                                       Walter J. Haas

                                        /s/ Walter J. Haas
                                       ---------------------------------
                                       Walter J. Haas, Trustee
                                       Walter J. Haas 2019 Trust 1A