Zappos.com

With classic style that's perfect for everyday wear, the Kapena is made to block out all irritating glare and harmful UV rays.
SuperThin (ST) Glass Lens: For general wear, ST Glass is 20% thinner and lighter than conventional glass giving you superior optics, durability, and scratch resistance without the weight. Three rare earth elements boost colors resulting in clarity, comfort, and glare protection.
PolarizedPlus2 Technology: All Maui Jim Sunglasses block glare and UV from all angles, manage blue light, and then boost colors for unmatched color, clarity, and contrast.
Natural Grey Lens offers contrast and the highest available light reduction. Suitable for all light conditions, especially bright, direct sunlight. 8% light transmission.
HCL Bronze Lens is perfect for low-light conditions, or for those who like a subtle bronze hue for everyday wear. Offers excellent contrast. 12% light transmission.
Adjustable metal core temples create a personalized fit.
Spring hinges gently hug the head for lasting fit and comfort.
Nickel/Silver Alloy Hinges: Provide strength, easy movement and corrosion resistance.
Lens treatments and frames are saltwater safe.
Monel frame, composed of various metals including nickel, silver, and zinc, is strong with some flexibility. Easily adjusted.
Rx Availability: Please contact an eye care professional for prescription availability for this style. Rx availability varies by style.
Made in Italy.
Case included.
Dimensions: Lens 61mm W x 39mm H Bridge 21mm Temple 121mm
Backcountry.com

You love the benefits of glass lenses (super scratch-resistant) but aren't stoked on the weight (heavy glasses kill your nose-bridge). Maui Jim made the Kapena Polarized Sunglasses with lenses that use a thin, light glass. This means you get durability and scratch resistance without the weight of normal glass. The polarized technology blocks glare and UV, manages blue light, and boosts colors so you won't have to squint when you're out on the water. Treatment on the lenses and frame holds up to saltwater exposure.