Frame: laminated black wood with metal nose pad
temples: laminated black wood+metal+black acetate caps
lens: CR39 non polarized gray gradient lens

Made by more than 18 layers wood sheets, top quality wood frame products.

frames more flexibility, can assembly prescription lens directly, below link show details.

https://youtu.be/zu54FegrECg

frames curve more perfect to fit the prescription lens.

we did the test for the frame curve change shape or not by putting the frames in the refrigerator one night and in the boiling water more than 10 minute, the result is amazing.