How does the shoulder strap work on the Mifold?

The adult seat belt chest strap must lie on the child's clavicle (collar bone); not on the face or neck and not over the edge of the shoulder. The Mifold shoulder belt positioning strap and clip is attached to the back of the Mifold seat and goes behind the child’s back. The clip is then attached onto the adult seat belt chest strap and holds it down on the clavicle. The length of the belt positioning strap and clip is adjusted to the right position.