What is a futon cover?

A futon cover is a slip cover made of fabric that incases a futon mattress on all sided.  The mattress slips into the cover easily.  Unzip the three sidded zipper on the cover, slip the mattress in, zip the zipper and your all set.  Covers are standard sizes and fit most full futon mattresses.  Fabrics are dry cleanable or machine mashable as per the manufacturers recommendations.