FIG. 1 is a perspective view of the left odd of a pair of slipper outsoles showing my new design; the right side sole being a mirror image, and being removed for convenience of illustration; and the broken lines showing a slipper upper illustrating the portion of the design that forms no part of the claim;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof; and,

FIG. 6 is a bottom plan view thereof.

The broken lines shown in the periphery of the claimed surface throughout the views are understood to represent stitching.