The Zeal Optics Tensai Polarized Sunglasses take the award-winning fit and function of the Maestro down a size for those of us with smaller faces. The frame is a nylon and metal hybrid with spring hinges for durability. The lenses are polarized polycarbonate with the ZB-13 color for excellent optical performance. The lenses block 100UV ABC are virtually shatterproof and comfortable for long term wear. The sunglasses are shipped in a hard-plastic carry case to limit the use of paper packaging. Tensai means Genius in Japanese, and provides a fit that is simply genius.