Reusable Adjustable Paracord Sunglass/Eyewear Lanyard Sunglass Neck Strap Rope Lanyard Holder Pack of 12pcs Assort Color Cord Length: About 60~65cm(length may vary) Suitable for: optical frames, reading glasses, sunglasses Material: Nylon, this stunning yet simple eyeglass holder is lightweight and neutral Keeps Your Glasses Secure Around Your Neck / Slider Fit Adjustment