The ornamental design for a sanitaryathleticovershoe, as shown and described.
FIG. 1 is a front perspective view of a sanitary athletic overshoe, showing my new design in use condition;
FIG. 2 is a right side elevation view thereof.
FIG. 3 is a front elevation view thereof.
FIG. 4 is a rear elevation view thereof.
FIG. 5 is a top plan view thereof; and,
FIG. 6 is a bottom plan view thereof.
The dotted line showing of the leg, high top sleeve with zipper, and broken line showing of the circle on the overshoe is included for illustrative purposes only and forms no part of the claimed design.