I claim the ornamental design for a wetsuit, as shown and described.
FIG. 1 is a left perspective view of a wetsuit, showing my new design; and,
FIG. 2 is a front view thereof.
The regular dot-dash lines are included for the purpose of illustrating portions of the wetsuit that form no part of the claimed design. The bold dot-dot-dash lines represent boundaries of the claimed design. The broken lines down the middle, front of the wetsuit, within the bold dot-dot-dash boundary represent unclaimed subject matter.