These cheap sunglasses remind me of Steve McQueen's Persols.
I take a lot of fashion cues from the King of Cool. McQueen's signature sunglasses were the Persol 714 with blue lenses and damn if they aren't both cool, and expensive! These SUNGAIT glasses are not expensive, and they certainly share a lot of design elements.
The keyhole bridge and blue lenses were McQueen enough for me, but there is an 'amber' pair that looks pretty faux-tortoiseshell if you just gotta.
While these are glasses claim to only work for women, they work fine for all small to medium size faces regardless of gender. The materials are light, the frames are thin, the lenses claim to block UV.