I read that it was "convertible" which I interpreted as "collapsible".  It does not fold to fit under my bed, which is discouraging but acceptable.  I have to carry it from bedroom to garage which is not ideal, but again acceptable.  Now I have to continue to invent ways/bribes to have my Sunday visiting Molly dog feel willing to climb up and down the ramp.  Last Sunday she refused to even try, despite me climbing up and down the ramp at least 3 dozen times plus the treats that I had waiting for her at the top of the ramp. Will keep trying/bribing.  Thank you. Jo