The RubiconĀ® T4 series curved frameless lens design offers a close orbital seal for increased protection, a soft gel nose piece for added comfort, and durable metal temples with non-slip, soft temple material. The frameless design keeps your line of vision clear, helping you focus on the task at hand. These high-quality safety glasses have a lifetime frame warranty and are engineered to provide the highest level of innovation for consumers who demand the very best. Choose the best safety glasses, choose MCR Safety! This product meets the ANSI/ISEA Z87.1 2020 standard.