The Tifosi Optics Logic Non-RX Sun Glasses LOGIC is made with polycarbonate lenses that have been decentered to reduce eye strain and magnification. The frames on this pair of Sunglasses by the expert product engineers at Tifosi Optics are made with Grilamid TR90, a homopolyamide nylon that is characterized by it's extremely high alternative bending ability and low density. The hydrophilic, adjustable ear and nose piece on the Tifosi Logic Nylon Frame Sun-Glasses are fully customizable for an incredibly comfortable fit. This Tifosi Optics Sunglass provides you with 100% protection from potentially eye damaging UVA and UBS rays.