From Chums

The Slip Fit rope retainer slides over your eyewear frames to provide a forward-mounted style. The nylon rope construction provides unique strength and durability, while adjustable bead allows you to easily find the perfect spot for your shades. Fits small to medium frames.

• Streamlined forward-mount ends
• Fully adjustable with bead
• Durable perlon cord
• Made in the USA
• Length: 14″
• Usable length: 23″