You can still use the iWALK crutch if you are wearing a cast or boot, in fact, the calf strap is extra long just for this purpose. There are few things you should know, however:

First and foremost, check with your doctor. That done, the most obvious limitation is that the cast has to be restricted to the lower leg, below the knee (you have to be able to bend your knee 90 degrees to use the iWALK 3.0 crutch).

Ideally, your cast will not contact the knee platform but it’s ok if it does. Sometimes your doctor will make your cast a little shorter if they know you intend to use the iWALK 3.0. Casts normally come up to just below the knee, though.

If any part of the cast is going to rest on the knee platform, you’ll want to measure the diameter of your cast-ed calf at the location where the calf strap will go around your calf. To find this spot, kneel on a chair or stool so that your leg is bent 90 degrees.

Note:

Some boots have adjustable air bladders or other hardware mounted on the front of the boot.  This hardware can sometimes interfere with proper interaction between the Knee Platform and the boot.

The solution is to disable the air bladder or obtain a boot that has the hardware mounted on the side.  Ideally you have a semi-smooth surface on the front of the boot or will need to bore a hole in the knee platform foam or make up a support layer with a recess for the valve to go into.