Abicsi

Abicsi is an independent eyewear brand based in Toronto, and its sunglasses are made in Canada. The frames are nylon, built from laser-fused nylon powder and 3D printed on super high-tolerance machines, then finished by hand. It's an unusual mix of precision technology and a distinctly DIY attitude, which you don't often see in eyewear.

You might already know their work: Abicsi are the makers of Rayon Vert's Wormholes shades. You can find the sunglasses at Dover Street Market London, and Outsiders Store has started stocking them too. If you like your accessories with a bit of engineering behind them, this is a good label to look at.