When partial fixation and extension of the cervical vertebrae is prescribed. This brace offers two–piece construction which makes the collar height adjustable from 3" to 4.5", the circumference is also adjustable. It has a ventilated translucent plastic body with vinyl covered padding at the top and bottom. Ideal for restricting lateral head movement. Features: • It has a ventilated translucent plastic body with vinyl covered padding at the top and bottom. • Adjustable from 3" to 4.5". • Contoured padded edge to prevent chafing. Measure neck circumference. Order BH83900 – with chin rest. BH83910 – without chin rest.