Soft, open-pored foam, density 45, to wear day and night. Anatomically shaped to ensure an optimum fit. Recess for larynx. With skin-friendly cover (100% cotton). Adjustable Velcro closure.One length only (56 cm / 22.1 inches), to fit neck circumferences from 32 to 45 cm (12.6 to 17.7 inches).Indications:For whiplash injuries to the cervical spine, painful torticollis, after operations of the cervical spine and after torticollis operations, cervical spine syndrome.Measurement point: K- chin height (tip of chin to sternoclavicular joint) / cm.