Fortis’ new Vistas in Switch sunglasses aren’t even launched yet and we’re giving you the chance to win a pair! Unlike other sunglasses on the market, these combine light sensitive lenses with their Triple X lenses and the result is nothing short of 4K fish-finding vision!

The ‘Switch’ element means you don’t have to carry various different colour lenses with you depending on the weather conditions. On bright days they turn darker, and on overcast days they remain light. Clever, huh! To read our full review, click here

This month, Fortis are kindly offering two lucky CARPology.net readers the chance to win a pair of these £89.99 sunglasses and to do so, just answer this question: