I agree with Hank. Read the description very carefully:

THIS IS AN ONSCREEN WORN KILT BY MEL GIBSONS CLAN IN MOVIE BRAVEHEART.I PURCHASED THE KILTS AFTER FILMING FROM THE COSTUME COMPANY PROVIDING ALL CLOTHING FOR MOVIE, THIS IS THE LAST ONE I KEPT AND NOW SELLING. IT COMES WITH A ROUGH BROWN SHIRT. ALSO SELLING SOME OTHER COSTUMES FROM BRAVEHEART
This is one of the kilts from the film, but not one worn by Mel.