The Durden is a goggle with minimum frame and maximum field of vision. This goggle features a new way of mounting the goggle strap, where the strap is on out outside of the frame, making sure you get the best possible fit with your helmet. The vent foam is laminated on the inside of the frame which makes it extremely durable. It 's a fairly large goggle with a 1.3 mm thick injected lens with oleophobic- and hydrophobic coating treatment. There also is a hook interface on the bottom part of the lens which makes it easier to fit into the frame, and easier to change. Our revolutionary RIG (R) lens technology is optional, developed by Sweet Protection to provide superior contrast, minimum color distortion and reduced eye fatigue. Sweet Protection Durden Goggles + RIG Reflect Topaz Lens | Matte Black | Christy Sports