The ornamental design for the workout towel with integrated pockets, as shown and described.
FIG. 1 is a front view of the workout towel with integrated pockets with dashed lines indicating stitching around the pockets and the border of the towel of which is environmental matter forming no part of the claimed design.
FIG. 2 is a rear view of the claimed design.
FIG. 3 is a right side view of the claimed design.
FIG. 4 is a left side view of the claimed design.
FIG. 5 is a top view of the claimed design; and,
FIG. 6 is an isometric view of the claimed design with dashed lines indicating stitching around the pockets and the border of the towel of which is environmental matter forming no part of the claimed design.