From Wiley-X:
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.
Micro Fiber case is included for cleaning and storage.
Light rust lens offer an exceptionally bright, blue-blocking view even in low light.
Hard case option available.