SHINKODA Kids Silicone Anti-slip Eyeglasses Strap and Ear Hooks Set Safety Eyewear Retainer For Kids Sports - Pack of 2 - Black Plastic Imported The strap & ear hook set can be used combined also can be used alone. Elastic silicone, doesn't soak up sweat, get dirty, stink or fray. Compact and light weight design provide a comfortable wearing feel. Soft, durable, adjustable, colorful, fun, washable, skin safe. $9.99 for set of 6, Please search ( B06XY6QCY2, B01H1LQ7ZM, B06XYLKBHW ) on Amazon.