Today i have received the FLEX-180, including the Z-liner. The FLEX-180 is a piece of workmanship. Very high quality as i am used from Clark. Furthermore the ropes have improved. They are longer and smaller in diametre. It makes it a lot easier to make a knot.
The Z-liner covers 1 person in the diagonal position. Please find hereunder some pics. The weight is approx 28 ounces. It's a smart way to cover the bottom since a full bottom coverage would have been much heavier.
The red part is covered by the Z-liner. The rope on the right makes it possible to find a real flat position if you're alone.