let me say this another way. A______________________slipcover ( fill in the blank ) does the following:
it appears to float on air. There are no reminders of the shape, color or detail of the upholstered piece beneath.
there is no struggle between the slipcover and the furniture wearing it. It's restful and relaxing to look at, there's nothing to tinker with or fix.
Fill in the blank. I'd love to have something unique or succinct. Maybe it cannot be short.