This pattern is written for those who have been taught to follow a chart for double filet/intermeshing, it does not include instructions on how to do double filet /intermeshing, or written instructions.
It includes a pattern for the main cushion cover but also a pattern suggestion for a scarf and smaller sample patterns if you wish to practice the technique first.
The pattern use any weight yarn but you will need to alter your hook to get the drape of cloth you require, I suggest DK weight and a 4.5mm hook but I suggest doing a small sample to check your gauge.