Chums Slip Fit Sunglasses Retainer - 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. Features Streamlined forward-mount ends Fully adjustable with bead Durable nylon perlon cord construction Made in the USA Usable length: 23in Weight without packaging: 0.3 oz.