Fashion people love layering, but when the humidex hits 40°, that shirt/ sweater/blazer combo is going to drown you in your own sweat. The solution? Pick out a signature summer T - Toronto sportswear brand Binbin has a catalogue of dandy options. Saturated colours, simple, graphic-design-influenced prints and fitted shapes have best-dressed locals swooning. Wear a couple at a time if you can't break the covering-up habit. Binbin double bird print T-shirt, $64, Over the Rainbow , 101 Yorkville, 416-967-7448, www.binbincorporation. com.