The Back on Track Neck Cover with Polo Neck was designed in co-operation with the Swedish Patient Rehabilitation Organization for sufferers of whiplash injury. The Neck Cover with Polo Neck design has a "bib" front and rear, which are of the same size. The rear bib is designed to cover the back's big trapezium muscle. This is an important area for those suffering from whiplash injuries as the trapezium muscle contributes significantly to a person's neck pain. The Neck Brace offers protection for the whole shoulder area. If pain also affects your shoulders or shoulder blades, then we recommend that you complement the neck brace with a Back on Track T-shirt or Long Sleeved T-shirt to cover the whole area. Comes in a range of sizes (Extra Small, Small, Medium, Large and Extra Large).