Surprisingly easy to remove the leg portion. This is very useful for decreasing the weight of the chair if you need to move it.

You might be able to get to the side securing fasteners with out removing the leg portion, but it is easy to do.

Carefully lift up on the main seat cushion. It is just velcro (ed) in place

then pull the top of the leg cushion portion forward

Next release the thin crossed velcro straps by pulling them forward as well