TAC polarised lens. Frame and temple are made of wood. Top hand-made real wood. Seiko and fine 3D-polish. Eco-firnedly material. Strengthen spring hinge. Strong and durable. Ergonomic nose design.Eco-friendly wooden sunglasses in a classic style that looks good and fits everyone.Polarised 9-layer lenses with 100% protection against harmful uv(uva/uv8) rays.