Croakies Eyewear Retainer is made of high quality knitted polyester yarn material that is durable, sweat resistant, and secures your eyewear through everyday adventures. This adjustable glasses strap with a slider bead allows for a snug fit around the head for small to medium sized frames. The stylish screen printed designs of the eyewear retainer is perfect for a trendy look wherever you go. This eyewear retainer strap is washable.