A seat assembly includes a seat of a vehicle, a safety belt, and a guide assembly. The seat includes a seat back and an attachment feature that is operatively connected to the seat back. The safety belt includes webbing that is configured to extend in a generally diagonal direction across the seat back. The guide assembly includes a clip, a cord, an attachment mechanism, and a breakaway mechanism. The clip is configured for operative attachment to the webbing of the safety belt. The cord operatively extends from the clip. The attachment mechanism is operatively connected to the cord. The attachment mechanism is configured for selective attachment to the attachment feature of the seat back. The breakaway mechanism operatively interconnects the cord and the clip and is configured to separate such that the cord pulls free from the clip upon the application of a force to the clip or the cord.