The PT-1 offers a virtually unbreakable Triloid nylon frame that allows the user to easily change specific lens tints for various light conditions. The Circular frame design surrounds the frontal lobe, providing incredible peripheral vision and backlit glare reduction. The custom nose pad is constructed from a soft, clear, neoprene rubber compound that can be adjusted to accommodate any size nose bridge and set the level of the frame on the face. The ear tips are made from a rubber compound, designed to grip better as your body temperature rises. Select your own "Custom Built System" from the lens options below and capitalize on the finest in eyewear technology.