John Bartlett dedicated his new collection to "the plant-based man." His Spring range was entirely made from sustainable linen. This kind of conscientiousness is rare in fashion, but for Bartlett, it s nothing new. For Fall, his line was wholly vegan: Ultrasuede for leather, nylon in place of wool. Twenty years into his career, he s emerging as menswear s most committed naturalist. That s a commitment worth celebrating. The downside is that, like many plant-based diets, this one didn t offer enough to sink your teeth into. Wearable as it all was, from suiting to cross-cultural specialties like the djellaba and adaptations of the guayabera and the shalwar kameez, it was missing some heft on the runway. A presentation might ve suited Bartlett and his laudable ideals better.