Four different collars in one easily adjustable, fully assembled collar Just measure the patient, select the size, adjust, and lock in four simple steps. Not Easy to Wear: The neck protector has a simple structure, is not easy to wear, is strong and durable. Soft and Comfortable Material: The inner material of the neck protector is soft and comfortable, which can prevent the neck from scratching again when it comes in contact with it, and protect your neck. Carry Fixed Lock: The neck guard carries a unique fixed lock to ensure the stability and symmetry of the neck brace, as well as the safety of the neck, which helps to restore the proper cervical curvature associated with continuous use. Rear Opening Design: The neck-protection collar is designed with a rear opening, which is convenient for diagnosis and ventilation. It is breathable when worn. Please note that it cannot be used as a normal pillow all night. Material: Plastics Package List: 1 x Cervical Collar