Designed to treat foot and ankle flexion contractures, foot drop, internal/external hip rotation and pressure sores due to stroke, illness, trauma or immobility. Designed to ″float″ the heel, which aids/prevents heel irritation or decubitus ulcers. The lightweight plastic frame applies a gentle continuous counterforce to the plantar aspect of the foot. Laundry Bag, Rotator Bar and Toe Post included. Measure circumference of the calf 11″ from bottom of the heel.