The Ambu Head Wedge is fully disposable and manufactured out of recyclable plastic, making it both waterproof and very durable. It is adjustable to fit all sizes from children to adults, fits all known backboards and has strong, self-adhesive head strap with medical grade glue ensures a secure hold without any discomfort to the patient. The Ambu Head Wedge stores completely flat saving valuable storage space. It can even be stored attached to the backboard. The Ambu Head Wedge is totally radiolucent, CT and MRI compatible, ensuring that the patient is effectively immobilized even during examinations.