If you already purchased an ErgoUP Leg Support and need to add an extension, please purchase here. This upgrade includes a 6" extension as well as larger casters. If you are ordering a new ErgoUP Leg Support you can select this as an option from the page of the model you are interested in.
This extension simply attaches to your ErgoUP to increase the distance between your seat and your feet by up to 6".
This is used by people over 6 Feet in height AS WELL AS by people with larger bodies, especially with larger back sides that push them forward on their seat.