SIS Cover Interweave Futon Cover Fabric (Removable futon cover fabric only. Futon frame and futon mattress sold separately) -Ottoman Ottoman cover 28" x 22" Two-sided zipper closure for easy removal. Removable Cleanable Futon Fabric. This cover has no blue, but reather a warmish range of greys, almost a teal tinge. Plus, the scale of the pattern works very well; neither too busy nor too large for the sofa SIScovers guarantees all products on workmanship and materials for life! Your futon cover is important for several reasons. It provides protection for your mattress. It can be easily removed and cleaned. It makes for easy decorating--choose from hundreds of styles. It's economical--when you want to change your style, simply change your cover.