Assessment of the Sheffield Support Snood, an innovative cervical orthosis designed for people affected by neck muscle weakness.

•A protocol to assess cervical orthoses using inertial magneto units is proposed.•A customisable orthosis for progressive neck muscle weakness is presented.•The new orthosis and two other orthoses were compared in healthy adults.•The protocol allowed a quantification of the main differences between the orthoses.•The new orthosis allows selective support of movements along the chosen directions.