Easy-clean, lightweight boot uses a cushion of air to elevate the lower leg for complete pressure relief and improved airflow to the heel. There are two independent zones of inflation for a custom fit and heel height. Low-shear exterior slides easily to help bed mobility. Extended foot panel affords moderate foot drop protection. Fluid-resistant vinyl exterior. Soft flannel interior is gentle on the skin and helps wick excess perspiration. Inflatable model is ready to use out of the box. Economical un-inflated version saves on storage space also. One size fits most adults.