The seat cover has three zippers at the 40/50/60 marks. The seat cover includes four zippered "end-panels". Two for the seat pad cover (where your rear goes) and two for the back rest cover (where your back goes). This allows you to unzip the required zipper, zip on the four end-panels, and make a custom 40/60, 50/50, or 60/40 seat cover. Note that there are only four zippered end panels included, so if you need a 40/20/40 seat cover, you'd need an additional four zippered end panels, for a total of eight. There's about an inch or so of seat still exposed in the corners of the backrests by the hinges, but that's due to the design of the HR-V's Magic Seat not allowing the seat cover to wrap over it. The seat pad cover fits well for a universal one. The one on the "40" side is a near-perfect fit. The one on the "60" side is a tad loose, but not totally unacceptable. The seat cover as a whole does not interfere with the folding of the Magic Seat up or down.