The Birkenstock Boston is the type of shoe that lax playing boarding school heroes wear. Easy on, easy off. All chill with just enough slight refinement to entice a CEO's daughter from Darien into a night stroll to the bleachers. In the hands of the footwear collabo kings at Concepts, the Boston turns up like a '90s era Dave Matthews jam. Two versions are hitting—one with an orange felt upper and one in perfect all natural leather—each with a co-branded footbed. Rock with wool hiking socks. Or not. These bangers release at 10am December 20th.