A moon boot (or walking boot) is a thickly padded boot with an plastic outer shell and rocker sole. It works by attaching to the leg and helping to reduce load on the foot and distribute it more evenly. This protects the Plantar Fascia while still allowing the person to stay on their feet.
Moon boots are useful in severe cases of Plantar Fasciitis and for clients unable to reduce their activity level. These are used best as a short-term solution, as they can be hot, uncomfortable, and cumbersome. They may also weaken the leg muscles if used for more than a few weeks.