The unique Ambu Head Wedge is designed to immobilize a patient’s head instantly and effectively when placed on a backboard. It is applied easily and quickly in just four simple steps.With its innovative construction, the Head Wedge enables a perfect fit to the patient in one go, saving time at the scene when seconds count. Made of plastic, which is superior to any cardboard product; there is no need to worry about bad weather because the Head Wedge is even efficient on wet backboards.