Frame: TR90TR90 is a thermoplastic developed in Switzerland that is extremely durable, flexible and lightweight. leftLens: PolycarbonatePolycarbonate lenses are robust, shatterproof and offer excellent 100% UV protection. Spectacle shape:SLC (Seamless Lens Construction). Ideal for all sports. leftSizeMThe shape of the model Tain can best be described as expressive and striking. It combines style and quality. The most striking design element of the glasses is the smooth transition from the lens to the frame, called "Seamless Lens Construction - SLC". This creates a unique look that makes the sports glasses a fashion piece, the resulting shield effect also contributes to this. The TAIN model is a design variant from the SPEED OF LIGHT collection, which consists of a total of 4 glasses that all follow the same design promise.Lens Category 3