With a fantastic polarised lens, these allow for substantial contrast definition which makes them perfect for picking out objects in water and is why the majority of their lenses utilise this colour. They are great for low to bright light conditions. The most popular colour choice and highly recommended by their collective. This signature shape has been a style icon for over 70 years, but these bring their own twist to the must-have sunglasses design by incorporating a luxurious tortoise-shell frame or super smooth soft-touch, matte black frame. Weighing in at an incredible 21 grams these frames offer supreme comfort & classic style. These come equipped with a branded protective case and microfibre cleaning pouch to keep your glasses gleaming! Their brand new Switch technology allows the lenses to darken substantially in response to UV light. The lenses contain light sensitive molecules that change shape and colour when ultraviolet rays strikes them. The lenses will begin to lighten as soon as they are away from UV light, gradually returning to their original state. Through a course of a session, whether that be at low light at dawn, stalking in the midday sun or sitting watching them fizz at dusk, your Switch technology will be the perfect shades for all conditions. (Colours from pictures may vary). Specification: Frame Length: 141mm Bridge Length: 23mm Temple Length: 134mm Weight: 21g Models: Frame: Tortoise Shell - Model: AV001 - Lens: Polarised Graduated Brown Frame: Matte Black - Model: AV002 - Lens: Polarised Brown Frame: Switch - Model: AV003 - Lens: Polarised Amber – Brown Fortis Aviator Polarised Sunglasses