The Native Sons Matheson is a softly squared-off frame made from Takiron Japanese acetate which drops down dramatically on the face for a bold and protective look. The temples feature precious metal diamond tooled wirecore which is able to be adjusted to fit your features, which are attached to the frame front by 5-barreled hinges controlled with a star nut to adjust and hold tension. Signature grooved temple plates are inspired by vintage hi-fi stereos. The nose pads are constructed from the same acetate material as the front to blend and maintain a clean look. The Matheson is commanding yet friendly like a wild chef taking command of a late-night kitchen to serve up something satisfyingly unexpected. 100% handmade in Japan utilizing the highest quality materials. Acetate is cotton oil-based, easy to clean, and adjustable by any optician