THE IMPORTANCE OF FIT
The fit of your sunglasses is key. While cycling on the roads, sunglasses are unlikely to contend with much movement, unless of course you hit a rogue pothole or climb a steep hill rather vigorously. Throw running into the mix, however, and they're faced with a lot more bouncing. As such, your sunglasses need to fit perfectly.
Oakley refers to this as the ‘three-point fit'. Tamara Weinstein, Global Product Marketing Manager at Oakley explains more: