Comfortable Experience Our foot rest has two layers: the lower layer is 2.0" thick, and the upper layer is 3.7" thick. The ergonomic design of the foot rest gives you freedom to choose the proper height according to your needs and to better relieve the pressure on your limbs for long periods of sitting. Adjustable Height This foot rest has two-piece removable footrest with magic tapes between the upper and lower layers so that you can adjust the height of the foot rest according to your usage needs. When you want to add the height of the foot stool, you only need to pull the zipper and magic tapes between the two layers of the foot rest to switch the thickness for a higher height. Want it lower? Simply remove the bottom flat piece.