Warm days call for lighter colours and breathable fabrics, but there's no need to compromise on sophistication. Hugo Boss' 'Helford' suit is made from pure linen that's ventilating and a summer-appropriate bright white. The jacket is cut slim with narrow notch lapels, and lined through the sleeves so it lies smoothly over tees and shirts. The trousers are tailored straight with unfinished hems for your own alterations.