AliMed® AliGel™ Supine Positioning Set provides head-to-heel pressure redistribution and nerve protection for the most common high-risk areas while in supine. Convenient and versatile, this multipurpose set is ideal for many common procedures and includes a Head Donut, Ulnar Nerve Protectors, Dome Positioner, and Heel Protectors. 6-piece set.A. (1) Head Donut, Adult, 8"W x 1-3/4"H B. (2) Ulnar Forearm Protectors, 13"W x 18"L C. (1) Dome Positioner, 6"W x 14"L x 3"H D. (2) Heel Protector Wraps, 3/8"HAliMed® AliGel™ Positioners remain an industry standard due to the pressure-relieving properties of a unique gel formula that mimics fatty tissue and moves with the patient to reduce shear and help prevent pressure injuries. Additionally, AliGel absorbs shock, stretches, and retains its shape better than less dense gel positioners. AliGel is made of 100% dry viscoelastic polymers and includes an 18-month warranty against manufacturing defects.