The long, hazy days of summer are pure bliss. Until about, oh, now.The good news: Blustery fall days are not far off. Better suit up with Gar-de, an NYC-based design collective’s new line of shirts, jackets, and leather goods.Slip into a range of poplin tops, like the sky blue tuxedo shirt or standard button-down. Take things to new lengths with the cream shirtdress. We’re especially excited about the waxed cotton jackets (score the Venus, with leather and jersey details in dark sand or ash) and leather coats (the Switch has an asymmetrical zip and pronounced shoulders).Come September, you’ll thank us for keeping you cool in more ways than one.But don’t sweat it.Available at Matthew Izzo, 151 North Third Street (215-829-0606 or matthewizzo.com). To see styles, go to gar-de.com.