Window perch — a shelf fixed to the glass

The closest thing to a real perch, with nothing standing on the floor. Rigid tray held against the glass, padded seat, raised edge. It carries an adult cat flat and leaves room to turn around — which a plain hammock does not. It demands clean glass and a careful fitting: it is the heaviest model in the shop. Load it gradually, check it after a night, and never install it above a child's bed.