Shoulder beltThe shoulder belt must be mounted in a basic belt and locked with a separate lock to be a functional unit (can be ordered as a Careva Shoulder KIT). The shoulder belt offers firmer support for upright sitting compared to a chest belt. A chest lock (S art. no. 10122 or M L art. no. 10123) can be mounted on the shoulder belt to prevent the shoulder straps from slipping down over the shoulder.