... Feature: cervical collar Material: Plastic, Foam, Nylon Size: S,M,L Covered with 100% cotton stockinette and a Velcro ... .Ease of use during emergency conditionsIdea for :Strict immobilization after neck injury or spinal surgery to limit rotation ,flexion & extensionThe size ... ,there are three size about neck circumference the size S: 10''-13'',the size M:13''-16'',the size ...