A recognizable feature of the Klingon warrior costume was the spine armor worn on back of the tunic, and one of my projects involved modifying the design used by Paramount Pictures for longer-lasting use in the Parks and other attractions. To the left in the photos is a screen-used costume piece (worn by the character Alexander Rozhenko in "Star Trek: The Next Generation"); to the left is my recreation. The piece used by Paramount Pictures was made of fiberglass, and was in constant danger of breaking; my modified design was made of heat-molded Sintra board, which was lighter and more flexible. Both pieces were built of individual armor "plates" attached to a leather backing for flexibility.