FIG. 1 is a front, left side and bottom perspective view of an adjustable shower brush, showing my new design;
FIG. 2 is a rear, right side and top perspective view thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a bottom plan view thereof;
FIG. 5 is a front elevation view thereof;
FIG. 6 is a rear elevation view thereof;
FIG. 7 is a right side elevation view thereof;
FIG. 8 is a left side elevation view thereof;
FIG. 9 is a front, left side and bottom perspective view of the adjustable shower brush shown in FIGS. 1-8, but where the adjustable shower brush is shown in a folded configuration;
FIG. 10 is rear, right side and top perspective view thereof;
FIG. 11 is a top plan view thereof;
FIG. 12 is a bottom plan view thereof;
FIG. 13 is a front elevation view thereof;
FIG. 14 is a rear elevation view thereof;
FIG. 15 is a right side elevation view thereof; and,
FIG. 16 is a left side elevation view thereof.
The broken lines in the figures illustrate portions of the adjustable shower brush that form no part of the claimed design.