I need sun protection while racing just as much as during daily driving. The problem is that my sunglasses, Oakley Juliets, are impossible to put on while wearing a helmet.

Who makes sunglasses that are really easy to put on/remove while wearing a helmet? (I take the face shield off, so tinting that won't help.)

 

I have guess sunglasses, and they fit just fine

 

Almost any sunglasses that are not too curved and has relatively straight arms (not the wrap around kind). I used to ride motorcycles all the time with sunglasses and clear face shield (full face helmet). When dusk comes, you can take off the glasses. You need to keep the clear shield 'cause you don't want to ride without eye protection (big bugs).