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Keep your eyeglasses, sunglasses and safety glasses safe and close at hand with Carson Optical's Dusk Grey ER-20 Braided Gripz Eyewear Retainer for standard-sized frames. Made of temperature and corrosion-resistant hypoallergenic silicone, each end easily slides onto the earpieces and holds secure. Carson designed the braid so that the more you pull the tighter the hold becomes, ensuring your eyewear stays firmly in place. Grab a Gripz and keep your glasses safe while working, hiking, fishing, rafting, or during vigorous or rigorous outdoor activities.