Universal boot fully off-loads the heel area for the prevention or treatment of heel ulcers. Boot prevents plantar flexion contractures by comfortably maintaining the foot in a natural position. It will accommodate slight plantar flexion. The anti-rotation bar hides conveniently on the back of the boot and is easily rotated into position when hip rotation needs to be prevented. The adjustable toe posts support, protect and keep the sheets away from sensitive toes. Soft, fleece cuffs comfortably maintain proper position of the foot and ankle within the boot.