For the uninitiated, it may seem unnecessary. But sunglasses for your Mavic Air make a _HUGE_ difference in video quality. The Mavic Air has no aperture (f-stop) adjustment/control. So the only way it can control exposure is by changing the shutter speed. This results in really high shutter speeds when it is bright out, and that makes your video look weird when fast-moving objects are in the picture. Using an ND filter appropriate for the brightness brings that natural “motion blur” back. Our Mavic Air always wears sunglasses unless it’s overcast.