Brand New Size: One Size Adjustable 100% polyester Comfortable Recovery. The Aspen Vista Cervical Collar supports your neck and spinal cord with soft yet effective padding during recovery by comfortably limiting the movement of your neck and head. Easy Tracheal Access. The extra-large patient access window provides functional access for airway management and other essential procedures. Promotes Effective Skin Care. Proven cotton-lined Aspen pads wick moisture from the patient's skin while clickable polyurethane foam assures optimal pressure distribution. Compatible with Most Necks. The patented sizing system offers six height adjustment settings to easily accommodate a wide range of anatomies and allows easy adjustments on the patient. Easy to Adjust. After locating the yellow Height Adjustment Dial on the front of the collar, simply pull and turn the Height Adjustment Dial to select one of six height settings.