The Costa C-Line Adjustable Retainer.
Features:
• End-to-End Measurement: (short), 10 3/4”
• End-to-End Measurement: (extended), 17”
• Ultra thin, lightweight coated wire
• Adjustable Logo bead sliders. Provide a streamlined profile when worn
• Flat, low profile temple attachments
Model name: C-Line Adjustable Retainer 
