The cases are made of natural raw bamboo or FSC wood and recycled PVC. As a result, every cover is unique with its own story made of varying shades and knots. The material also delivers a smooth touch and feel not like the full PVC ones . The engraving is possible on full surface for customization. Regarding sustainability Carbon emmisions are 100% offset. Iso 14001 certification. The packaging is made of Kraft paper armband and thin PU.