Massage attachment

FIG. 1 is a top perspective view of a massage attachment showing the claimed design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a front elevational view thereof, the rear, right side, and left side elevational views being mirror images thereof; and,

FIG. 5 is a bottom perspective view thereof.

The broken lines in the figures show portions of the massage attachment that form no part of the claimed design.