Costa Del Mar C-Mono Retainers are a great way to make sure you don't lose your glasses! C-Mono retainers are constructed of high tenacity monofilament, making them strong and lightweight. They have a very thin profile so you don't even notice they are there when you are wearing your Costas.
Costa Del Mar C-Mono Retainers are available in five different colors. They fit most Costa sunglasses. Other brands too!
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