Very thin. One poor quality strap across the back to hold it in place with a hook that is hard to use and holds poorly. Nothing holds the seat in place, so order too large and tuck in. Nothing holds the footrest cover in place and you will need something. The over hang onto the back, the arms and onto the footrest is no where near what the photo shows. Make sure you measure your chair and then add to it so that it will overhang as shown and so that you will have enough material to tuck it in. Otherwise, it will slip and slide and you will hate it.