THE SIGNATURE FEATURE OF THE PANOPTX VELOCITY SERIES IS THE PATENTED ORBITAL SEAL. THIS FOAM-LINED EYECUP CAN BE EASILY REMOVED TO CONVERT YOUR SPEED-RATED EYEWEAR INTO A PAIR OF REGULAR SUNGLASSES. JUST CLIP THE EYECUP BACK INTO PLACE TO CREATE A COMPLETELY WINDPROOF, GOGGLE-LIKE SEAL AROUND THE EYES THAT MAKES THEM IDEAL FOR CYCLING. WHEN YOU ADD LENSES THAT ARE 100% UV PROTECTED,ANTI-FOG TREATED AND SHATTER RESISTANT, YOU'LL SEE WHY CYCLISTS LOVE THEIR PANOPTX EYEWEAR!!