Sunglasses

[mainswiggans]

I couldn't find a fashion category so i've stuck this in here...hope somebopdy out there knows the answer.

 

whilst away ijn portugal recently there was a gang of surfer type dudes on the beach (they reminded me of the 'groovies' from the film 'city of god') and one of them was wearing these amazing shades on. they were literally like a blike tube going around his eyes. they looked amazing. does anybody know what these type of sunglasses are called? who they are by? and where i can buy them?