they work, i made some. get some sunglasses and pop the lenses out. cut some cardboard and tape it to the bottom rim of the glasses so it pokes out so u cant see down. n then u put em on and ur done

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Age:14 Height: 5' 9" Running Vertical Jump: about 32 inches
Highest Poster On SBT
Good, better, best. Never let it rest. Until your good is better and your better is best.
-- Tim Duncan

they're great I use them and there really helping my game