Sure, the fact you’re still sleeping with your socks on and can see your breath in the morning air suggests the warmer months are some way off. But before you know it, the Great British Summer will swing into action and deliver a kick of heat with it, prompting you to rethink your hairstyle and address the need for a cut that is both light and low maintenance. Step forward, Ryan Reynolds' new gentlemanly take on the military-inspired buzz cut – the ideal, cooling solution to all your spring/summer hair woes.