If you break them, Sunski will fix or replace them for free. They make the lenses from triacetate cellulose, with the polarization layer sandwiched inside, like many higher-end lenses that help ...

Bacterial cellulose (BC), chitosan (CS), and waterborne polyurethane (WPU) were selected as the main components for their alignment with sustainability criteria. However, each material alone ...

It was once believed that cellulose was the structural material in the cell walls of all green plants. Now it appears that other substances are employed for this purpose in certain marine algae ...