Padded tubular design. Bends to adjust for neck flexion or extension. Allows access to a tracheal tube. Optional pads available for extra support. To size, measure from center of chin to corner of jaw. If between sizes, choose the smaller collar. Hand wash, air-dry. Optional accessories sold separately. Caution: This product contains natural rubber latex which may cause allergic reactions. Extension Pads. Two pads that can be variably placed to give extension or lateral support. Neck Pads. One pad centrally placed for comfortable extension resistance.