The Shinobi Sport Performance Sunglasses are our aggressive premium model featuring a solid lens attachment for high-speed activities. Poor visibility should no longer be your master. With the same high-quality, 2.2 mm thick, machined Toric lens as the Ronin, the Shinobi offers extremely stable and easy-to-change lens attachment technology. Simply slide the two buttons on each temple back, press in the middle of the nose bridge to change the lens, and click it back in place on the go. The Shinobi provides an excellent fit for all our helmets, with temples designed to minimize intrusion and maximize comfort. Included in the purchase are a hard case, a microfiber cloth, and three nose pieces to help you find your perfect fit.