I won these fiberglass chimp greaves in an eBay auction from Studio Props. They were designed by Oscar-winner Colleen Atwood for Tim Burton's Planet of the Apes.
These have clearly seen some action! Greaves are a piece of armour designed to protect the lower leg. These ones have some fantastic ape and bamboo designs on them. The inside is labeled "Keiffer." Dennis Keiffer was a stunt person on the film playing an ape. It's great to be able to match these to a performer!
These have some strange black rivets and remnants of black felt attached to them. I can only guess but maybe these were part of some stunt or FX rigging. There are several sequences with apes running or on horses that might have required special rigs.
These will make great companions to the chimp chest armour that I already have. I hope to build a full chimp warrior costume.