The ornamental design for a cap for dreadlocks, as shown and described.
FIG. 1 is a rear elevational view of a cap for dreadlocks showing my new design;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a right side elevation view thereof;
FIG. 4 is a left side elevation view thereof; and,
FIG. 5 is a top plan view thereof.
The evenly incremented broken lines represent environmental structure that forms no part of the claimed design. The dash-dot-dash broken lines illustrated within the interior portion of the cap represents the bounds of the claim and does not form part of the claimed design.