• Croakies has taken their classic Terra Cords and added the Plug n' Play Re-attachable End technology of the ARC System to create the Terra System
• Regular Terra ends fit 3-5 mm temples, XL Terra Ends fit 6-9 mm temples and XXL Terra Ends fit 9-15 mm temples
• 12" long (on each side) and 3.2 mm diameter, with an adjustable black bead; colorfast and washable

This sport retainer comes with multiple end options. Just cinch the adjustable slider bead tight to your head for a tight, secure fit during your most active moments or pull it all of the way back for a more relaxed fit.