Carson's revolutionary eyewear retainers will help prevent you from losing your expensive sunglasses and prescription eyewear. Toobz® (Dusk Grey) eyewear retainers, by Carson, are engineered from high-grade rubber silicone that will stand up to the elements and toughest use and abuse. Whether you're biking, fishing, rafting or participating in any other vigorous outdoor activity, the patent pending Toobz® retainers provide an extremely secure hold that will keep your valuable glasses safe.