Posted for N301ES <lancair@ustek.com>:

Flying in and out of the clouds, or at dawn or dusk, I like the ability to
flip them up and read my instruments better (esp. the Grand Rapids EIS).
 However in bright sun I stick to my Serengeti's.  Scheydon's come in a couple
shpes - not sure which I have.  Smaller than the big Raybans but seem to work
OK for me.
 Robert M. Simon,  ES-P N301ES, GlaStar N161GS