Onesie with Back Flap

FIG. 1 is a front perspective view of a onesie showing my new design;

FIG. 2 is a rear view thereof with the flap down; and,

FIG. 3 is a rear view of thereof with the flap up showing an elastic band underneath the flap.

The broken lines immediately adjacent to the shaded area represent unclaimed boundaries of the design. The unshaded regions and regions demarcated by broken lines form no part of the claimed design. The broken lines showing the/a are for environmental purposes only and form no part of the claimed design.