We all need sunglasses to ride our motorcycles, not just to cut the glare of the sun, but to protect our eyes from the wind. But you can not just fit any sunglass under your helmet; Many just will not fit, they might bend, or worse break. Motorcycle riding sunglasses need to be slim, and they need to cover the eyes properly, if not you'll be crying at the end of your ride.
Italian eyewear designer, http://www.bertonieyewear.com/ , produce sunglasses for a variety of sports. Obviously you can wear their sunglasses to the beach, but the majority of glasses are meant to be used for sports.
Their website is very well designed. You can select your favorite sports, and the site will show you which glasses are the most appropriate for you.
Or, you can use their advanced search capability. I, for example, need prescription glasses, which means many sunglasses are not suited for me. With their advanced search, you can specify gender, your sport (ie motorcycles), prescription, a specific product line and color. The result is a list of sunglasses tailored for your needs.
Using their advanced search capability, I found these nifty F310A sunglasses.
Made out of Grilamid, a very resistant nylon with shape memory, photochromatic lenses (so they change color depending on sunlight), condensation free and polycarbonate lenses.
They look cool, and they should be great when riding during fog changing to sun. Theeonly question is how quickly they change color, since some take too long to change.
Click here fore product info on the F310A
Or how about these AR123. Made out of polycarbonate with antireflex lenses. These babies will ensure that no wind blows in your eyes.
These look the business for serious motorcycle riding.
Click here for product info on the AR123
Interesting. Unfortunately, no prices.
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