These models of the human sacral region can be fastened on to the body of a student or a training doll like a belt and are made of soft realistic material. The set consists of 4 different "belts" and represent the following stages of decubitus in an extremely realistic fashion:
Stage I: The epidermis has not yet been torn but redness can be observed
Stage II: Abrasion, bleeding and effusion can be observed
Stage III: Healing process of stage IV where the fascia and musculature have been affected
Stage IV: Decubitus ulcer with visible tissue structures down to the bone.