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