Amazon.com: Chums 5 MM Universal Fit Retainer - Patented Tips Work with Most Eyewear - Unisex Sunglasses & Glasses Keeper - Adjustable Fit, Nylon Rope & Made in USA (5 MM, Olive) :
Chums Tideline Sunglasses Strap | REI Co-op
Chums Glassfloat Classic Floating Sunglass Retainer | REI Co-op
Amazon.com: Chums Lens Leash Eyewear Retainer, Black : Tools & Home Improvement