Venting System: Exhaust vents are incorporated into the design framework to enhance airflow, and virtually eliminate fog and condensation, while strategically placed hybrid vents and side vents (available on select models) keep frames snugger on your face without compromising fit. This unique design feature is the only system available that allows maximum ventilation while blocking extraneous incoming light.
Cushinol: Cushinol nose pads ensure a soft feel and custom fit, regardless of nose shape or size, and Cushinol temple boots create a non-slip grip to keep sunglasses in place during athletic activity
Cam-Action Hinges: This patented feature allows the temple to quickly lock into position
Mastoid Temple Grip: This proprietary design feature ensures the temple ends hug the mastoid bone (behind your ears), allowing for a secure and comfortable fit
Anti-Ocular Intrusion System: This revolutionary system is designed to prevent your lenses from dangerously shooting toward your eyes in the event of an impact
Optic Gear Kit, Additional Polarized Lens and SportFlex Included
"Great shades for people who sweat a whole heap!"
Shades are equipped with vents on the top, and the contact areas on the frame are designed to hold better when you sweat, and I find it true. I have a large head and the hug nicely, but for smaller heads they might be a little loose. The lenses can be changed out, and native provides a extra set of lenses which are lightly tented. I've read that these shades are designed for snow sports such as skiing, and I'm sure they work wonderfully. I've used them for lawn work, casual use, and kayaking so far and they are a all around good shade for anyone looking for good ventilation cause they sweat a whole lot. So buy a pair if your tired of your shades steaming up on hikes.