The Langevin glasses are made of added polycarbonate.The polycarbonate (PC) is a material with very high mechanical resistance but with limited dynamic resistance. For this reason, our glasses are produced by adding a percentage of ABS to the virgin PC granules, a polymer with elastic fibres that incredibly increases their resistance to torsion and flexion. Furthermore, thanks to the temple flex equipped with a spring mechanism, they are comfortable and light, adapting perfectly to any type of face.The polycarbonate lenses guarantee 100% protection from UV rays and maximum resistance to impacts.The result is a pair of light but robust glasses, ideal for everyday wear. ---- Model: TWIG LangevinGender: UnisexFrame: Added polycarbonateLenses: PolycarbonateType: UV 400 protectionTWIG packaging