Abstract: An insulating cover for floating on liquid, such as in a spa, has an area for covering an area of the surface of the liquid. The cover generally comprises a first rectangle for covering a first area and a plurality of successive rectangular tubes connected to either the first rectangle or to a larger rectangle formed by the addition of a prior successive tube so as to form another rectangle for covering additional area. The amount of coverage area can be adjusted by selectively detaching tubes, such as by cutting them off, and by changing the amount of inflation of tubes such that the cover is adaptable to spas of different sizes. In an exemplary embodiment, tubes adjust both the width and length of the cover, and the cover is adapted for folding substantially in half when inflated.

Abstract: An insulating cover for floating on liquid, such as in a spa, has an area for covering an area of the surface of the liquid. The cover generally comprises a first rectangle for covering a first area and a plurality of successive rectangular tubes connected to either the first rectangle or to a larger rectangle formed by the addition of a prior successive tube so as to form another rectangle for covering additional area. The amount of coverage area can be adjusted by selectively detaching tubes, such as by cutting them off, and by changing the amount of inflation of tubes such that the cover is adaptable to spas of different sizes. In an exemplary embodiment, tubes adjust both the width and length of the cover, and the cover is adapted for folding substantially in half when inflated.