IT’S MID-JULY AND SUMMER IS UPON US, setting even the busiest of cities — London, New York — in a languorous haze where days seem to move at a slower pace. Dinners are spent alfresco, preferably somewhere by the water, and weekend getaways to laze in the sun become routine. But deciding what to wear when it’s a blazing 28º outside and the preferable choice is nothing, can be difficult, for combining style with comfort is paramount…