Trachea Opening Cervical Collar provides the neck moderate to firm immobilization. OH-031 Tracheostomy Collar is made of high grade foam material. The trachea opening allows quick carotid pulse monitoring and emergency tracheotomies. The ventilation openings on the back shell can reduce heat and moisture during usage for maximum patient comfort. Trachea Opening Cervical Collar fits on patients with different neck heights and circumferences with adjustable loop. OH-031 Cervical Collar with Trachea Opening is X-ray, CT and MRI lucent.