A classic problem up a gently overhanging green face with many horizontal slashes. Sit start at the block on the lower right side of the face. Pull on and move up and left through the multitude of sloping horizontal slashes to a cruxy mantel high off the deck.
On the right side of the Gunks wall. Look for the obvious green face.
IIRC, the guidebook mentions that this can be started at chest/neck-height holds at the same grade. The sit probably makes it more full-value for the points, but I'm not sure if it really adds (or detracts) from the quality of the problem. Regardless, what really matters on it comes higher up, I think.