Easytwist crafts the ET 891-No Clip-On Lens eyeglasses in the company’s impressive proprietary memory metal, Trilaston. Unlike nickel/titanium alloys that can eventually lose their shape, the Trilaston copper/aluminum alloy can regain its shape even after twisting or bending. Easytwist frames also better resist shock, corrosion, stress, and even extreme temperature changes. The rectangular profile in the ET 891 gives these glasses a timeless look, and their thin rims exude minimalist appeal. For amazingly rugged memory metal frames with classic style, choose the ET 891 from Easytwist.