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The Croakies Tiki Koa neoprene eyewear retainer keeps sunglasses from slipping off your head. Tube ends slip easily over glasses temples; adjustable for a snug or loose fit. 2 in. of adjustment allow you to customize the fit. Croakies Tiki Koa eyewear retainer is colorfast and washable for long-lasting use. Designed for active sports and rugged use.