South Africa, Nov. 20 -- The hum of solar-powered machines fills the air at H+A's manufacturing hub. Outside, 15% of the property has been deliberately set aside for trees and gardens, creating green pockets alive with birdsong and shade. Inside, Chris Hewitt, founding member of H+A, wraps up a call confirming the next training session for South Africa's national para surfing team before heading into a meeting about a new recyclable packaging innovation.

This is what sustainability looks like at H+A: it is not a side project or add-on, but a way of doing business that informs every decision, every partnership, and every product.

H+A's state-of-the-art facility is a benchmark for sustainable manufacturing in Africa. Over 40% of its daily...