For those that are no strangers to speed, whether it's on the bike or their own two feet, there's the Julbo Aerospeed REACTIV Sunglasses. It's got a performance-minded, ultra-wide frame design that'll keep whipping winds out of your eyes as you sail down the road, and features photochromic REACTIV lenses that adapt to changes in light conditions to keep your visibility good from the start of your run or ride to its end, no matter how long that is. Fully adjustable nose pads and shock-absorbing temple grips ensure that your sunglasses won't slip out onto the pavement, and a ventilating design prevents your lenses from fogging up when you start to breathe heavier on never-ending hills.