Limited to five examples in each style, Black Optical and Jacques Marie Mage collaborate on an exclusive set of frames that are wrapped in bison leather. Available in the Zephirin and Yves (above) silhouettes, the material is ecologically sourced from American bison leather and each frame is wrapped by hand in Italy. The leather undergoes a tanning process that shrinks the leather by 30% to achieve its pebbled texture. The frames themselves are made in Japan and each one features matte black or custom 18k gold hardware. 

$2,000, blackoptical.com