The ornamental design for a removablemattress cover, as shown and described.
FIG. 1 is a front-left perspective view of a removable mattress cover showing my new design, the rear-right perspective view being mirror-symmetrical thereto;
FIG. 2 is a left side elevational view thereof;
FIG. 3 is a right side elevational view thereof;
FIG. 4 is a front elevational view thereof;
FIG. 5 is a rear elevational view thereof;
FIG. 6 is a bottom plan view thereof;
FIG. 7 is a top plan view thereof;
FIG. 8 is an exploded perspective view showing the upper and lower portions of the removable mattress cover removed from exemplary internal components of a mattress, the opposite perspective view being mirror symmetrical thereto; and,
FIG. 9 is a detail view of a front portion of the removable mattress cover being opened, the detail view of the rear portion being symmetrical thereto.
The broken lines illustrate unclaimed features that form no part of the claimed design. The removable mattress cover is shown with a symbolic breaks in its length, width, and height. The appearance of any portion of the article between the break lines forms no part of the design.