The Mangrove Jacks Holyhead sunglasses in matte crystal dark brown are a lightweight and comfortable design that offers exceptional UV protection. The fitted blue mirror polarised lenses help cut out surface glare, preventing eye strain and fatigue so you can spend longer days in the sun and have no worries. Whether you're spending long days on the boat or simply a day at the beach, Mangrove Jacks shades are the perfect choice.