The ornamental design for a case for dryers, as shown and described.
FIG. 1 is a perspective view of a case for dryers showing our new design;
FIG. 2 is a front view thereof;
FIG. 3 is a first side view thereof;
FIG. 4 is a back view thereof;
FIG. 5 is a second side view thereof;
FIG. 6 is a top view thereof; and,
FIG. 7 is a bottom view thereof.
The zipper shown in broken lines is not part of the claimed design. The other broken lines represent stitching that is part of the claimed design. The shade lines represent surface contours not surface ornamentation.