If you wander into Uniqlo and search for something green, you have your pick of hoodies, joggers, polos, stretch pants, turtlenecks, shorts, chinos, fleece jackets, parkas, panel caps, argyle socks and t-shirts (both crew and v-neck). Such a mind-boggling selection of green apparel is, of course, a given in the area of fast fashion. But should you wander into Uniqlo’s global flagship store at 666 Fifth Avenue in New York this week, you’re likely to notice a new green offering that’s truly distinct.