The ornamental design for an insole, as shown and described.
FIG. 1 is a perspective view of the claimed design;
FIG. 2 is a bottom view thereof;
FIG. 3 is a top view thereof;
FIG. 4 is a right side view thereof;
FIG. 5 is a left side view thereof;
FIG. 6 is a front view thereof; and,
FIG. 7 is a rear view thereof.
The ornamental design which is claimed is shown in solid lines in the drawings. The dash-dot boundary lines shown define the boundary of the claimed design and form no part of the claim. The broken lines shown are included for the purpose of illustrating the unclaimed portion of the insole and form no part of the claim.
The dot-dash broken lines represent the bounds of the claimed design while all other broken lines are included for the purpose of illustrating the unclaimed portions of the article; the broken lines form no part of the claimed design.