Thinking of getting a pair of Oakley shades for the piste. In Borovets you can pick a pair of unofficial's up between 12 and 15 levs........that's just £4 - 5.50.
I bought some rip off "oakleys" in the shop in the Hotel Pamporovo for 12 lev. They had good protection from the sun and were very comfortable. Unfortunately I left them on top of my head and when I reached up to pull the safety bar down on the chair lift they fell off and landed on a ledge on the edge of the lift station. Sob.