Wiley X 4004 Guard Advanced Glasses Smoke Grey Clear Lenses Matte Black Frame Top frame / split lens design meets VO ballistic standards. Part of Wiley X Changeable series. Compact sleek ultra low design. Removable air permeable brow bar Double injected temple tips provide comfort and security. Shatterproof Selenite Polycarbonate interchangeable lenses with scratch resistant T-Shell hardcoat Interchangeable smoke grey ballistic and clear ballistic lenses included. Changeable lenses provide all day protection 100% UVA / UVB protection. RX capable - frames can be fitted with prescription lenses. Black MOLLE compatible top zip double sleeve case with carabiner included Fit head sizes: M, L. Lens width: 77mm. Bridge width: 12mm. Temple length: 120mm. Light transmission: smoke grey lens - 15%, clear lens - 90%. Weight: 35g