Double branch system WING Secure hold and firm fit with the additional extendable support. Frame: TR90 + Rubber TR90 is a thermoplastic developed in Suisse that is extremely durable, flexible and light. The rubber ensures an optimal grip. Lens: Polycarbonate Polycarbonate lenses are strong, unbreakable and offer excellent UV protection. Eyeglass shape: Square/Base 8 Polarized Polarized lenses are particularly beneficial for sports and leisure activities. They absorb glare, enhance contrast and improve color perception. Optimal face shape: rectangular or oval Possible eyewear Possibility to change the lenses for corrective lenses. The best way to do this is to contact the optician of your choice. Rocket is the choice of athletes and demanding sunglass wearers.