Made of Grilamid TR 90, a homopolyamide nylon characterized by an extremely high alternative bending strength, low density, and high resistance to chemical and UV damage. Hydrophilic rubber ear and nose pieces for a no slip fit.Tifosi Optics Interchangeable sunglasses feature decentered shatterproof polycarbonate lenses to virtually eliminate distortion, give sharp peripheral vision, and offer 100% protection from harmful UVAUVB rays, bugs, rocks, or whatever comes your way. Lens installationremoval is fast and easy.The Tifosi Optics GT lens tint features object illumination, which enhances your ability to pick up a ball in flight by providing a balance of target and background brightness. Whether you are at net or tee, the GT tint is designed to help keep your eye on the ball. Available in GolfTennis Interchangeable models and as a Fototec lens.