sustainable, bio-based goggle from out of. the bio project goggle is a first step towards products that don't put our winters and our beloved outdoors at risk, without compromising on performance and durability. the frame consists of pearlthaneâ„¢ eco tpu. a renewable source-based tpu extracted from castor oil that contains up to 46% of bio-based material. parts like the buckles and the lens frames are made of rilsan® clear g 850 rnew, a high performance copolyamide specifically designed for high end optical frames, that contains up to 51 % of renewable carbon.smoke lensthe smoke is a lens with a neutral smoked pigmentation without coating. perfect for sunny weather conditions.filter category: 3transmittance of visible light: 8 %